8 подписчиков
64 видео
Company show
Caught a wild copper factory
Tellurium copper: high electrical and thermal conductivity material
The recycled material: copper
C54400 copper alloy
C54400 bronze
tellurium copper factory
C17200 beryllium copper manufacturer
工厂实拍 the actual factory shooting
Aluminum copper
C18700 lead bronze
The hardest and strongest copper alloy
