Method for disassembling double-layer shell shield tunneling machine in tunnel
Manufacturing method of soft light-transmitting coating piece with customized pattern
Noctilucent suede material as well as preparation method and application thereof
MULTIFUNCTIONAL INTEGRATED SPECIAL VEHICLE FOR TREATING CONTAMINATED SITE
Negative pressure elevator car with air disinfecting and filtering functions
Blue-green algae collecting ship with filter pressing function
Modularized intelligent overwater unmanned operation platform