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This new model of drilling machine can bore through solid rock ten metres deep.
这台新型钻机能钻透十米厚的坚固岩石。
youdao
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The utility model relates to a pump valve of a well drilling mud pump.
本实用新型涉及钻井泥浆泵的泵阀。
youdao
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The utility model relates to a pump valve of a well drilling mud pump.
本实用新型涉及钻井泥浆泵的泵阀。
youdao