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In the complete set of water supply equipment, whether no negative pressure water supply equipment or variable frequency constant pressure water supply equipment... -
2020-01-141. The handwheel and handle of manual valve are designed according to the hand force of ordinary people, considering the strength of sealing surface and necessary closing force... -
【Technical knowledge】 The corresponding method is adopted to control the deformation in a small range as far as possible2020-01-14Heat treatment technology is an important means to obtain good properties of various metal materials.In many practical applications, reasonable selection of materials and various forming processes can not meet the mechanical properties... -
2020-01-14According to incomplete statistics, the number of enterprises lacking smelting workers, molding workers, engineers, quality control and management personnel in China's foundry industry is about 58%, 20%, 50%, 34%...
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