真空装置

公司诚挚欢迎各界朋友前来洽谈和指导，进行广泛的合作，并向所有客户致以良好的祝愿！

anti-siphonage device (backsiphonage preventer, anti-vacuum device)

vacuum tube

vacuum-tube amplifier【电子】

vacuum-tube clipping circuit

high-vacuum science【真空】

can vacuum tester

high-vacuum distillation

rotary vacuum quick-freezing shaping machine