... intermediate crushing 中碎 intermediate drill 中间钻杆 intermediate entry 中间平巷 ...
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intermediate base drill 中间钻杆
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Research shows that fatigue life of drill pipe was influenced by the geometric shape in intermediate belt formed during the end upsetting process.
研究表明，在钻杆管端加厚过程中所形成的内加厚过渡带的形状对钻杆的使用寿命有显著影响。
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