双闸板防喷器型号表示

范缸策4657石油机械英语翻译 -
羊孔芬17148918955 ______ 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 ...