【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《英语作文尺子》,欢迎阅读!
Multi functional Ruler
The ruler is mostly made of plastic or wood or stainless steel. A long years ago .when The ruler is no invention , people use some simple tools to measure the length. For example, with a rope in the body, when we needed to use it to compare the length, the ancient Egyptians used a rope to measure land. Someone think, can use a part of the body to do the measurement tools, such as open thumb and middle finger (or little finger) the distance between the two ends of oak (Zha), known as the 1 adult arms around with both hands when the distance between the 1 called Tuo (Tuo), when China's ancient measure land, often with step count.
Different occasions using a ruler on the different requirements and standards, if the numerical value is accurate, it needs higher technology, but must have the aid of precision instrument. But now the ruler has a major disadvantage. Unable to draw parallel lines.So I made a multifunctional ruler.
Multi functional Ruler made of stainless steel. The rotary gear can slide out a hidden rule. The two ruler can draw parallel lines.The two ruler can draw the lines of different angles.
Internal structure : The combination of several big gear and small gear, By rotating the transmission power.
Clockwise rotation can make the small hidden ruler parallel
launched, two ruler combination draw parallel lines. Counterclockwise rotation can make the small hidden ruler while rotating, the other half is fixed, the two ruler can draw the lines of different angles. Each gear is 12 sided, subdivision of 360 degrees.
The design has many unique creativity, such as a ruler to draw a circle to improve the innovative design, precision protractor, and humanized appearance combinatorial design, the design has a lot of humanized design, can make the work of drawing complex tools to simplify, this design is compact and beautiful, with a combined drawing ruler convenient and practical many! The design of a good deal with the integration of function and appearance, combined the
many uses of the tool without the loss of beauty, be intelligent without losing the modern aesthetic requirements.
The ruler is the most taboo moment values of scratch and fuzzy, so the rulers become stationery inside the most protected products, usually use a ruler ruler we should pay attention to what?
1, the first is to use the method of ruler to correct, such as the
demarcation of had better not use plastic ruler materials, it would be very easy to be scratched. There are a lot of people make a mistake, it was when the line drawing is very fast, and then because of slippery ruler and characteristics along the ruler across, it will get to spend number, so moderate speed.
2, the ruler should not with a knife or metal stationery mixed together, mixed together must be set on the pen cap and the pen.
3, we must prevent the sun and long sunshine, especially plastic ruler temperature resistant performance is not good, will be deformation 4, it is best not to brush clean, meaning that as far as possible not to dirty the ruler.
本文来源:https://www.wddqxz.cn/ab4288a8102de2bd960588b9.html