双闸板防喷器重量

胥珠钩839石油机械英语翻译 -
穆堵艳17061268999 ______ 2FZ18-35 bore ram blowout preventer is in our hospital developed a new type of test workover blowout preventer with a double plate. The blowout preventer and a half closed gate with 2-7/8 ＂~ 3-1/2＂ bore ram, can meet the test tube with a ...