anti-siphonage device (backsiphonage preventer, anti-vacuum device)
真空指示器
vacuum indicator【真空】
暂无补充释义。
相关词条
vacuum chamber
bale, casc (barrel), wood, roller, stone, vacuum-gripper, two-arm gripper
neon light tube vacuum pump
vacuum-tube relay【电】;valve relay【电】
double-chamber vacuum packing machine
final vacuum
vacuum column