1.Ukupholisha ngomshini Ukupholisha ngomshini kuyindlela yokupholisha esusa izingxenye ezipholishiwe ze-convex ngokusika kanye nokuguqulwa kwepulasitiki kwendawo yezinto ezibonakalayo ukuze kutholwe indawo ebushelelezi.Ngokuvamile, kusetshenziswa imichilo ye-oilstone, amasondo oboya, i-sandpaper, njll., ikakhulukazi ukusebenza ngesandla, kanye ne-p ekhethekile ...
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