在游梁式抽油机上使旋转的平衡块与游梁相连的钢杆。
The steel beam that connects the rotary counterbalance with the walking beam on a beam pumping unit.
钢杆，钢骨，双金套手柄，色丁布伞面，透明膜包装，晴雨兼用。
Steel pole, steel ribs, golden handle, sadin cloth cover, translucent plastic film packing, both for rainy and sunny use.
钢杆，玻纤伞骨，彩晶柄手柄，花尼伞面，透明膜包装，晴雨兼用。
Steel pole, fibreglass ribs, colorful crystal handle, colorful nylon cloth cover, translucent plastic film packing, both for rainy and sunny use.
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