Meinten Sie:
person:("zhang jiawei")
Split tensioning type traction sheave bush and assembling method
Floating type comprehensive power generation platform
Device for realizing rotation function of OAL and operation method
Multilayer grating bearing cylinder and preparation method thereof
Plate valve type exhaust valve for ram air inlet and method
Design method of plate valve type exhaust valve of cabin pressure regulating system
Adjustable 1/4 wavelength tube, method and control system