Ny takelaka vy matevina 1.2-1.5mm dia tokony ampiasaina ho an’ny varavarana vy afo, 0.8-1.2mm ny takelaka vy matevina dia tokony ampiasaina amin’ny takelaka ravina varavarana, ary ny takelaka vy matevina 1.2-1.5mm dia tokony hampiasaina amin’ny fanamafisana. Ny varavarana vy tsy misy afo sy ny varavaran-trano dia tokony ho feno fitaovana tsy mety levona, ary ny mari-pana mitsonika ny hidin-trano, hinge, bolt ary fitaovana hafa dia tsy tokony ho ambany noho ny 950 ℃.

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