Metallurgical industry: The vacuum technology used in the metallurgical industry includes molten steel vacuum processing, vacuum melting, vacuum induction melting, …

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Understanding What VoIP Means VoIP — which stands for voice over Internet protocol and often pronounced “voyp” — is a …

　　 1. Start of plunger pump 　　 ①Turn on the cooling water 　　 ② Close, turn on the switch, click …

Reducing noise of slide valve vacuum pump The noise of slide valve vacuum pump is mainly produced by impact. Whether …