How to write the introduction, operation, and conclusion of a mechanism description.

1. introduction,
operation and
conclusion

3. introduction

4. Writing the Introduction

5. Define the product

6. The Staedtler Noris 120 HB pencil is a tool used for
wri:ng or drawing. It creates marks by physical abrasion of
graphite on paper or other surfaces. These marks can be
removed using an eraser. This descrip:on is intended to
explain to the end user the structure and opera:ng
principle of the Staedtler Noris 120.

7. Say how it works

8. The Staedtler Noris 120 HB pencil is a tool used for wri:ng
or drawing. It creates marks by physical abrasion of
graphite on paper or other surfaces. These marks can be
removed using an eraser. This descrip:on is intended to
explain to the end user the structure and opera:ng
principle of the Staedtler Noris 120.

9. State the intended audience

10. The Staedtler Noris 120 HB pencil is a tool used for wri:ng
or drawing. It creates marks by physical abrasion of graphite
on paper or other surfaces. These marks can be removed
using an eraser. This descrip:on is intended to explain to
the end user the structure and opera:ng principle of the
Staedtler Noris 120.

11. General Description

12. Give the overall shape

13. The main body of the pencil is a hexagonal prism with a yellow and black
painted exterior. There is a graphite cylinder running through the center of the
body. One end of the body tapers to a point in order to expose the graphite.
At the other end, there is an eraser which is aGached to the body by a casing.
The pencil is made from a combina:on of wood, graphite, aluminum and rubber.
Figure 1 shows the four parts of the pencil. The pencil has an overall length of
190.5 millimeters and a width of 7 millimeters. The major parts of the Staedtler
Noris 120 HB are:
•the main body
•the graphite cylinder
•the casing
•the eraser

14. State the materials used

15. The main body of the pencil is a hexagonal prism with a yellow and black
painted exterior. There is a graphite cylinder running through the center of the
body. One end of the body tapers to a point in order to expose the graphite. At
the other end, there is an eraser which is aNached to the body by a casing. The
pencil is made from a combina:on of wood, graphite, aluminum and rubber.
Figure 1 shows the four parts of the pencil. The pencil has an overall length of
190.5 millimeters and a width of 7 millimeters. The major parts of the Staedtler
Noris 120 HB are:
•the main body
•the graphite cylinder
•the casing
•the eraser

16. Give the overall dimensions

17. The main body of the pencil is a hexagonal prism with a yellow and black
painted exterior. There is a graphite cylinder running through the center of the
body. One end of the body tapers to a point in order to expose the graphite. At
the other end, there is an eraser which is aNached to the body by a casing. The
pencil is made from a combina:on of wood, graphite, aluminum and rubber.
Figure 1 shows the four parts of the pencil. The pencil has an overall length of
190.5 millimeters and a width of 7 millimeters. The major parts of the Staedtler
Noris 120 HB are:
•the main body
•the graphite cylinder
•the casing
•the eraser

18. List the major parts

19. The main body of the pencil is a hexagonal prism with a yellow and black
painted exterior. There is a graphite cylinder running through the center of the
body. One end of the body tapers to a point in order to expose the graphite. At
the other end, there is an eraser which is aNached to the body by a casing. The
pencil is made from a combina:on of wood, graphite, aluminum and rubber.
Figure 1 shows the four parts of the pencil. The pencil has an overall length of
190.5 millimeters and a width of 7 millimeters. The major parts of the Staedtler
Noris 120 HB are:
•the main body
•the graphite cylinder
•the casing
•the eraser

20. operation

21. List the steps

22. make sure to use sequence
words

23. First the main body of the pencil is held between the thumb and
the first two fingers with the exposed graphite facing the paper (as
shown in Figure 3, below). Secondly, the exposed graphite is
placed in contact with the paper. Third, the pencil is moved
against the paper. Fourthly, the graphite is abraded (rubbed) by
the paper, causing it to adhere to the paper and leave markings.

24. and passive voice

25. First the main body of the pencil is held between the thumb and
the first two fingers with the exposed graphite facing the paper (as
shown in Figure 3, below). Secondly, the exposed graphite is
placed in contact with the paper. Third, the pencil is moved
against the paper. Fourthly, the graphite is abraded (rubbed) by
the paper, causing it to adhere to the paper and leave markings.

26. conclusion

27. review the function and
number of parts

28. The four parts of the Staedtler Noris 120 HB pencil combine to
create a tool which allows the user to write and draw cheaply
and easily. The graphite of the pencil is placed in contact with the
paper and the physical abrasion caused when the pencil is moved
leaves graphite marks on the paper. The advantage of the pencil
over a pen is that it allows the user to remove mistakes they have
made via the eraser. Staedtler Noris 120 HB is available from most
sta:onary stores for a price of around $0.25. For more
informa:on, go to www.staedtler.com.

29. summarize the operation in
one sentence

30. The four parts of the Staedtler Noris 120 HB pencil combine to
create a tool which allows the user to write and draw cheaply and
easily. The graphite of the pencil is placed in contact with the
paper and the physical abrasion caused when the pencil is
moved leaves graphite marks on the paper. The advantage of the
pencil over a pen is that it allows the user to remove mistakes they
have made via the eraser. Staedtler Noris 120 HB is available from
most sta:onary stores for a price of around $0.25. For more
informa:on, go to www.staedtler.com.

31. give the reader some new
information

32. The four parts of the Staedtler Noris 120 HB pencil combine to
create a tool which allows the user to write and draw cheaply and
easily. The graphite of the pencil is placed in contact with the
paper and the physical abrasion caused when the pencil is moved
leaves graphite marks on the paper. The advantage of the pencil
over a pen is that it allows the user to remove mistakes they
have made via the eraser. Staedtler Noris 120 HB is available
from most sta:onary stores for a price of around $0.25. For
more informa:on, go to www.staedtler.com.

33. tell the reader where they can
get more info

34. The four parts of the Staedtler Noris 120 HB pencil combine to
create a tool which allows the user to write and draw cheaply and
easily. The graphite of the pencil is placed in contact with the
paper and the physical abrasion caused when the pencil is moved
leaves graphite marks on the paper. The advantage of the pencil
over a pen is that it allows the user to remove mistakes they have
made via the eraser. Staedtler Noris 120 HB is available from most
sta:onary stores for a price of around $0.25. For more
informa:on, go to www.staedtler.com.

35. Seagate Backup Plus 500 GB External Hard Drive - Technical Description
Introduction
The Seagate Backup Plus 500 GB External Hard Drive is a device used for storing and
retrieving digital information. It works by recording data by magnetizing a thin layer of
ferromagnetic material.
This description is intended to explain to the end user the structure and operating principle
of the Seagate Backup Plus 500 GB External Hard Drive.
General Description
The Seagate Backup Plus is rectangular in shape and is made from a combination of
stainless steel and black plastic. The overall dimensions of the Backup Plus are:
length - 114mm
width - 75mm
height - 16 mm

36. Description of Major Components
The Seagate Backup Plus 500 GB External Hard Drive consists of three major
components; a) the main body, b) the hard disk and c) the connector cable.
Main Body
The main body is the component that protects the hard disk. It is rectangular in shape
and has a stainless steel top. The back and sides are made from black plastic. There is a
micro USB 3 port at one end of the body. The body is 114 mm long, 75 mm wide and 12
mm high.
Hard Disk
The hard disk is the component that stores information. It is a polished aluminum circle
located inside the main body. The diameter of the circle is 67 mm and the width is 1.6
mm.
Connector Cable
The connector cable is the component that connects the hard drive to the computer. It
is a copper wire covered in black plastic. There is a Micro USB adaptor at one end and
standard USB adaptor at the other. The length of the cable is 500 mm and the thickness
is 4mm.

37. Operation
First, the Micro USB 3.0 end of the connector cable is connected to
the hard drive. Second, the standard USB end is connected to the
computer. Third, the hard drive is opened on the computer
desktop. Fourth, files are dragged from their location to the hard
drive. Lastly, the hard drive is ejected from the computer.

38. Conclusion
The Seagate Backup Plus 500 GB External Hard Drive consists of
three major components; a) the main body, b) the hard disk and c)
the connector cable. These parts combine to allow users to transfer
files and other electronic information easily.
The Hard disk is connected to the computer via the connector cable
snd files are dragged and dropped onto the hard drive before the
hard drive is ejected again. The Seagate Backup Plus is available at
most stationary stores for SR 375.