The quality of the internal surface can be greatly improved and the punch force can be significantly reduced by using inner set hose.
内置软管可以有效改善管材的内表面质量，并显著减小冲头推力。
The quality of the internal surface can be greatly improved and the punch force can be significantly reduced by using inner set hose.
内置软管可以有效改善管材的内表面质量，并显著减小冲头推力。
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