Drawing sketches is the basic drill of future engineers.

画图纸是这些准工程师的基础功。

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Orthopedic drill tool can be served according to the specific drawing size or sample.

骨科类钻头，工具可以按客户提供的尺寸图、或者样品生产。

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Making use of the rig general detecting laboratory to test the deferent maximal feeding force and drawing back force of drill rig, the validity of theoretic accounting value are analyzed in the paper.

利用钻机综合检测实验台测试成品钻机的输出最大给进力和起拔力来检验理论计算结果的正确性。

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