This paper researches into enhanced heat transfer of condensation of splitting gas of waste plastics and R113 on the general smooth tubes, the screw tubes and the aculei finned tubes.
本文研究制冷剂r 113和废塑料制汽油过程中产生的裂解气在水平光滑管、螺纹管与“犁刺”管上的冷凝强化传热。发现“犁刺”管的制冷传热效果约为光滑管的14倍，为螺纹管的10倍。
For carbon steel, stainless steel, plating steel and all kinds of non-ferrous metal rods, tubes, the sheet metal, screw the spot welding and welding until the row.
可进行碳钢、不锈钢、电镀钢及各种有色金属的线材、管材、板料，螺钉等到的点焊和排焊。
If this coloration is absent, loosen the screw caps and place the tubes in a boiling water bath for 10 minutes to drive off the dissolved O2 from the medium.
如果这种颜色变化并不存在，松开管子上的螺旋盖子，同时放在沸水浴中十分钟去驱赶溶在培养基中的氧气。
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