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1.Cut off 5-10cm of the protective film before inserting pc sheets to the support frame,because the protective films would cause inefficient adhesive between tamping and pc sheets.

2.Since the expansion and contraction degree of pc sheets, are different from that of medal frames, as well as pc sheets are flexible and taking air pressure, therefore, approapriate insertion, reserving space for expansion and shrink because of temperauture changes, and choosing suitable thickness of pc sheets are necessary. General plate should be inserted into fixed frame for over 25 mm, with at least 2 ribs installed into the fixed zone,3mm place will be reserved for expansion or shrinkage.(expansion ratio:0.065mm/moC)

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