bending sub drilling tool
bending sub drilling tool
弯曲接头钻具
以上为机器翻译结果,长、整句建议使用 人工翻译 。
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The purpose for the later is to improve the existing rotor screw drill for high efficiency. Subject heading: horizontal drilling screw drill tool control bending sub st...
研制后者的目的,在于改善现有中空转子螺杆钻具的软特性和低效率。
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