英语翻译Dear Sandy I try to explain you the matter and enclosed

英语翻译
Dear Sandy I try to explain you the matter and enclosed I put a part of EN-14766 MTB about test on Chainwheel.
4.13.6.2.3 You need for this test a chainwheel /chain/ rear sprocket .
4.13.6.2.3 Multi-speed system
a) Conduct the tests described in 4.13.6.2.2 with the transmission correctly adjusted in its highest gear;
b) conduct the tests generally as described in 4.13.6.2.2 with the transmission correctly adjusted in its lowest
gear but,where appropriate,with the maximum force,F,adjusted to suit the particular gear ratio,thus:
The maximum force,F,shall be a function of the lowest gear ratio,Nc/Ns
where
F is the force applied to the pedal,N;
Nc is the number of teeth on the smallest chain-wheel (front);
Ns is the number of teeth on the largest sprocket (rear).
Where the ratio Nc/Ns has a value equal to or greater than one,the force,F,shall be 1 500 N,but where the ratio
Nc/Ns has a value less than one,the force,F,shall be reduced in proportion to the lowest gear ratio thus:
F = 1 500 x Nc/Ns
FORT FATIGUE TEST OF CHAINWHEEL YOU NEED TO FIX LEFT PART,BUT IN YOUR PICTURE I SEE A PISTON IT IS NOT THE SAME.
4.13.7 Crank assembly – fatigue tests
4.13.7.1 General
Two types of fatigue test are specified,one with the cranks positioned at 45° to the horizontal to simulate the forces
due to pedalling,and the second test with the cranks positioned at 30° to the horizontal which has been found to
simulate the forces due the rider standing on the pedals during the descent of hills.The two tests shall be
conducted on separate assemblies.
If the pedal-spindles are too short for the test forces to be applied 65 mm from the outer faces of the cranks
suitable extensions shall be fitted to the spindles for the purpose of the test.
4.13.7.2 Requirement
When tested by the methods described in 4.13.7.3 and 4.13.7.4,there shall be no fractures or visible cracks in the
pedal-spindles,the cranks,the bottom-bracket spindle or any of the attachment features,or loosening or
detachment of the chain-wheel from the crank.
For carbon-fibre cranks,the peak deflection of either crank during the test shall not increase by more than 20 % of
the initial value.

谷歌翻译：
亲爱的桑迪我试着解释你的事,我把一个封闭的EN - 14766关于对链轮测试山地车的一部分.
4.13.6.2.3你需要为这个测试链轮/链条/后链轮.
4.13.6.2.3多速系统
1）进行描述,正确地在4.13.6.2.2在其最高齿轮传动调整的考验;
b）就一般在4.13.6.2.2描述,正确地调整了最低传输测试
齿轮,但在适当情况下,以最大力量,女调整,以适应特定的齿轮比,因此：
的最大力量,女,应为最低齿轮比功能,数控/纳秒
哪里
F是用于踏板,N的力量;
数控是牙齿上最小的链轮（前）的数目;
生理盐水是牙齿上最大的链轮（后面的数字）.
凡比数控/ ns的有值等于或大于1,部队,男,为1 500氮,但如该比率
数控/ ns的有值小于1,部队,男,应减少到最低比例齿轮比为：
女= 1 500 ×数控/纳秒
作者堡链轮疲劳试验您需要修复的剩余部分,但在您的图片我看到了活塞的IT是不一样的.
4.13.7曲轴总成 - 疲劳试验
4.13.7.1一般
疲劳试验的两种类型的规定,同在45 °到水平位置的曲柄一个模拟的力量
由于踩踏,以及与曲柄在30 °定位于已发现的第二个测试水平
模拟期间,由于山血统的力量踏板上的骑手地位.这两项测试应
进行单独的组件.
如果踏板主轴是为测试力量过于短暂,从适用于65毫米外的曲柄面孔
须安装适当的扩展,以用于测试目的的主轴.
4.13.7.2要求
当在4.13.7.3和4.13.7.4所述的方法进行测试,不得有裂缝或在可见裂缝
脚踏主轴,曲柄,底部括号梭形或附件的功能,或松动,或任何
支队链从曲柄轮.
碳纤维曲柄,无论是在测试过程中曲柄不得增加超过20％的高峰挠度
初始值.