Optical simulation and preparation of novel Mo/ZrSiN/ZrSiON/SiO2 solar selective absorbing coating
Pit-free traction type platform elevator car structure
Multi-degree-of-freedom mobile phased array ultrasonic automatic detection device
Dynamic weighing device convenient to move and based on chain transmission pallet fork
Force and direction sensing device for following trolley
Tail door inner plate forming method and tail door inner plate
Method and system for observing verticality of tower crane