Grating plate biasanya memiliki permukaan bergerigi atau bertalang untuk meningkatkan daya cengkram dan mengurangi risiko selip.industri2034@ gmail.com   _ _ _ _ _ _ _ GLASSWOOL  SURABAYA Glasswool or fibreglass insulation is produced from melted glass spun into a versatile mat or wonderful fibres. Ordinarily offered to the marketplace in batts o