短語(yǔ)詞組短語(yǔ)chemical l preservative 化學(xué)防腐劑biological and chemical combined preservative 生物化學(xué)復(fù)合防腐劑chemical preservative formula 化學(xué)保鮮劑Wood preservative chemical 木材防護(hù)劑 返回 chemical preservative