常見(jiàn)例句雙語(yǔ)例句The favourable conditions for developing the drum type long stroke pumping unit are expounded.論述了發(fā)展?jié)L筒式長(zhǎng)沖程抽油機(jī)的有利條件。The crank-chain driving and long stroke pumping unit described in this papes is a new type of pumping unit.曲柄鏈條動(dòng)滑輪式長(zhǎng)沖程抽油機(jī)是一種新型抽油機(jī)。The cylinder chain lower super long stroke pumping unit is a kind of up to date and high efficiency equipment.圓柱鏈低矮式超長(zhǎng)沖程抽油機(jī)是一種新型高效有桿采油設(shè)備。 返回 long stroke pumping unit