ObjectiveTo explore differences in the closurespeed abilities of various professions and their age-effects.
目的探讨趋向速度能力的职业差异及其年龄效应。
2
The second step is to select the closure may be required to meet the speed of the check valve type.
第二步是选择可能满足所需要的关闭速度的止回阀类型。
3
State regulation of coal production, the closure of some of the poor conditions of small coal mines, coal supply will cause a decrease in the market, thus delaying coal prices downward speed.