On the basis principle of elevator equilibrium coefficient to design a new measure instrument.

基于电梯平衡系数的测试原理，设计开发一种新型测试仪。

youdao

On the basis principle of elevator equilibrium coefficient to design a new measure instrument.

基于电梯平衡系数的测试原理，设计开发一种新型测试仪。

youdao