短語(yǔ)詞組短語(yǔ)new -style and long-stroke pumping unit 新型抽油機(jī)fan -shaped horsehead long-stroke pumping unit 扇形驢頭長(zhǎng)沖程抽油機(jī)type long stroke pumping unit 鏈?zhǔn)介L(zhǎng)沖程抽油機(jī)chain -type long stroke pumping unit 鏈?zhǔn)介L(zhǎng)沖程抽油機(jī)long -stroke chain pumping unit 長(zhǎng)沖程鏈條抽油機(jī) 返回 long stroke pumping unit