Four hole on the jaws with center spindle adjusting, long stroke.

爪设计四孔,可因拔轮深度调换,缸体烤漆, 行程长.

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A type of - saving and long - stroke pumping unit is designed.

文章介绍了一种挂钩换向链条驱动的长冲程节能抽油机的结构和工作原理.

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Chain type long stroke pumping unit is mainly used in mid and anaphase oilfield.

链式长冲程抽油机主要是为开采中、期油田而设计的.

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I made four of these which, with the two long stroke 49's, made six.

我提出了四项这些, 与两个长冲程49的, 取得了6.

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Long stroke pumping unit ( Model 20 ~22 ) with derrick frame was developed for new production.

塔架式长冲程抽油机 ( 20~22型 ) 是配合油田采用新工艺而研制开发的.

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The favourable conditions for developing the drum type long stroke pumping unit are expounded.

论述了发展滚筒式长冲程抽油机的有利条件.

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Newly reformed Caterpiller long stroke designed lower consumption compared with same kinds of products the markets.

新改进的长冲程设计使卡特彼勒产平的油耗量低于市场同类产品.

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