本实用新型由刀片、导向块、刀体和刀杆组成。
The utility model comprises blades, guide blocks, a cutter body and a tool bar.
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.
该第二支撑臂可沿第二方向伸缩，且其一端连接于该连接块，另一端具有一个第一导向件。
The second supporting arm can expand and contract along a second direction, one end thereof is connected with the connecting block, and the other end thereof is provided with a first guide part.
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