Current label: Reliable rectangular tube wholesale
Reliable rectangular tube wholesale Give you a detailed introduction Reliable rectangular tube wholesale Product classification of, including Reliable rectangular tube wholesale The purpose, model, scope, pictures, news and price of all products under. At the same time, we have selected Reliable rectangular tube wholesale The classified industry information, price quotations, exhibition information, picture materials, etc. have won praise from users nationwide. For more details, please click to visit!
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Identification method of rectangular tube: 1. Fake and inferior rectangular tubes are easy to fold. Folding is a variety of broken lines formed by the appearance of rectangular tubes, and this defect often runs through the longitudinal direction of the whole product. The reason for folding is that the fake and inferior manufacturers pursue efficiency, and the reduction is too large to produce ears. The folding will occur during the next rolling. The folded products will crack after bending, and the strength of steel will drop greatly. 2. Pseudo
