We have to change the C4 drawing coil-15848, because we can't do every hole location of the collar pipe END PLATE material used is stainless steel to prevent problems that would arise from a copper pipe rupture.Large steel rod is added to 9 mm. To be used as a supplementary beam between the fin and the END PLATE.End plates for every position hole tubes must be punching all the big size 16 mm. Can't make a COLLAR?The foldting is a method designed to prevent copper pipe leak caused by crashing into the hole of the plate.
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