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As we all know, the strength design of the gear is carried out from two aspects of the tooth surfac ...
In the new year of the 12th Five-Year Plan, Sinochem’s new film industry has made s ...
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locust Tree species name: Robinia pseudoacacia Trade name or alias: Black locust, artichoke, ...
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Recently, China Iron and Steel Industry Association released the national crude steel production ...
Model NO.: QX
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