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2022-01-12
2021年我单位危废产生总量为:0.281吨 转移量为:0.135吨 贮存量为:0.146吨 特此公开!...
2015-09-15
Bearing Assembly of Downhole Motor is used to transmit motor rotary dynamic force to the bit, meanwhile to withstand axial and radial load from drilling weight. Inside of the Bearing Assembly, EFU PETRO uses TC Radial Bearing and a stacked...
2015-05-16
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