powered supports
- 网络动力支架
powered supports
powered supports
动力支架
WorldWideScience.org... ... power transmission towers( 输电塔) powered supports( 动力支架) poynting theorem( 波印廷定理) ...
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Withdrawing Technology for Powered Supports in a Fully Mechanized Face under Complicated Geological Conditions
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Technology for hydraulic powered supports removed from fully mechanized coal mining face under complicated geological conditions
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