一本色道久久综合狠狠躁篇_色多多性虎精品无码AV_欧美成人精品一区二区综合_亚洲啪AV永久无码精品放毛片

不(bu)銹鋼光(guang)(guang)亮(liang)盤管:由不(bu)銹鋼帶焊(han)(han)接好(hao)再(zai)減(jian)壁(bi),減(jian)壁(bi)由厚(hou)到(dao)薄(bo),此過程(cheng)(cheng)可(ke)以使壁(bi)厚(hou)均(jun)勻,光(guang)(guang)滑,并且減(jian)壁(bi)拉伸(shen)管壁(bi)形成(cheng)了無焊(han)(han)縫的效果.按照肉眼看是(shi)無縫管,但是(shi)其工(gong)藝決定(ding)是(shi)焊(han)(han)管.減(jian)壁(bi)的過程(cheng)(cheng)中伴隨光(guang)(guang)亮(liang)退火,使內外(wai)(wai)壁(bi)不(bu)會(hui)形成(cheng)氧化層,內外(wai)(wai)光(guang)(guang)亮(liang),美觀,這真是(shi)醫用產品所需要的。下(xia)道(dao)工(gong)序需要定(ding)徑(jing)(jing),即大(da)拉小工(gong)藝,確定(ding)外(wai)(wai)徑(jing)(jing),外(wai)(wai)徑(jing)(jing)公差一般(ban)可(ke)以達到(dao)正負0.01mm.


上一篇:沒有了!  下一篇316L不銹鋼盤管