1. Isipontshi esiphindiweyo: Isipontshi esisetyenzisiweyo luhlobo lwemveliso esetyenzisiweyo eyeyamalahlwa eemveliso zepolyurethane. Yenziwe ngezinto ezilahlwayo zesiponji kwimizi-mveliso ezityunyuziweyo, zazanyazanyiswa, zahluzwa, zazaliswa inzala kwaye zakhutshwa ivumba elinobushushu obuphezulu beglu kunye nomphunga wacinezelwa kwi...
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