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羊场地质队为解决200/30型水泵胶皮碗供应不足的困难，在继废皮带废轮胎代替皮碗试验成功之后，又大胆地根据“干木遇水膨胀”的原理，进行了以木材制成“木碗”代替皮碗的试验，在孔深40～470公尺清水循环的钻孔中，试验了四种不同性质木材制成的木碗，收到了一定效果（见表）。
In order to solve the problem of insufficient supply of 200/30-type water pump rubber cups, the sheep field geology team has succeeded in adopting the principle of “dry wood swells with water” in accordance with the success of waste-waste tire tires instead of skin cups. In order to replace the leather bowl with a “wooden bowl”, four wooden bowls made of wood with different properties were tested in boreholes with a depth of 40 to 470 meters in the clear water circulation. Some results were obtained (see table).