石油钻具
在线联系供应商
Other supplier products
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锻件 | 轴，法兰，油缸体，齿轮， |
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石油钻具 | 钻铤，稳定器，无磁钻铤，四方钻杆 |
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锻件 | 轴，法兰，油缸体，齿轮， |
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