Vertical transportation means indispensable in elevator-type high-rise buildings, it is a large-sca......
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The heat treatment process generally includes three processes of heating, heat preservation and coo......
Trends <br> <br> heavy machine is now basically a flexible, composite processing, mainl......
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In the first three quarters, the machinery industry continued to grow rapidly, and the level of ben......
The yield of winter melon in China is relatively high. During the peak season of autumn harvest......
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When using SKF bearings, we must first check the appearance of the imported bearings to determine w......
The NURBS method is built on the B-spline method, which better realizes the unification of analytic......