Whether or not correct drilling comprehensive techniques are main reasons lead to hole deflection.

钻探综合技术正确与否是导致孔斜的主要原因。

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Crawler hydraulic drill, and USES the new type of hydraulic technology, low gas consumption, rotary torque, move the hole deflection is convenient.

履带式液压钻机，采用新型液压技术，耗气量低，回转扭矩大，移孔变位方便。

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Put the material in a known test hole on the aperture, and then through a small aperture will load imposed on the fabric, for reads deflection scale pointer value.

将待测材料夹在已知孔径的测试孔上，然后通过较小孔径将一定负荷施加于织物上，于刻度指针上读取挠曲度值。

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