Hardware Perkakas Ngarep 1.2mm lembaran galvanis sampel spot welding 1.5 + 2mm sampel spot welding stainless steel 1.5mm plat besi sampel spot welding 4 + 4mm pelat baja karbon sampel spot welding Air conditioner unit njaba ngisor plate gantungan proyeksi sampel welding Microwave oven liner multi-titik proyeksi sampel welding Microwave oven shell multi-titik proyeksi sampel welding Microwave oven shell multi-titik sampel welding Sampel pengelasan titik tulangan tulangan pelat ngisor AC Sampel pengelasan proyeksi cincin kacang stainless steel M50