尼龙滑块作导向，润滑性好，滑鞍升降平稳。
Guide by nylon slide, lubricate well, lifting up and down stable.
这种抽油机以连杆式换向机构取代原有的十字滑块式换向架，以重块平衡代替气平衡，并改进了导向系统。
The new unit uses the pitman reserse mechanism instead of the crosshead slide reverse rack, adopts weight balancing instead of air balancing, and is provided with an improved guiding system.
主滑块采用前后导轨，并经过磨削加工，导向性好，精度高。
Main slider processes with around road rail and via grinding, lead good, precision is high.
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