The minimum time after spraying at which lamination can be begun is the time at which the gel coat film backside can be brushed lightly with a clean, dry finger without leaving residue on the finger.是什么意思_The minimum time after spraying at which lamination can be begun is the time at which the gel coat film backside can be brushed lightly with a clean, dry finger without leaving residue on the finger.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句