Itekhnoloji yokubeka iPVD ibisenziwa iminyaka emininzi njengetekhnoloji entsha yokuguqulwa komphezulu, ngakumbi itekhnoloji yokucoca i-vacuum ion, eye yafumana uphuhliso olukhulu kwiminyaka yakutshanje kwaye ngoku isetyenziswa ngokubanzi kunyango lwezixhobo, ukubumba, amakhonkco episton, iigiya kunye namanye amacandelo. .I...
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