所有(you)(you)進出口包裝(zhuang)箱必須要有(you)(you)真空(kong)(kong)(kong)(kong)包裝(zhuang)，其工(gong)藝特點為工(gong)件與木(mu)箱之間增加一(yi)只真空(kong)(kong)(kong)(kong)包裝(zhuang)套，通常為鋁泊紙，并加上(shang)幾層(ceng)緩沖材料(liao)，真空(kong)(kong)(kong)(kong)包裝(zhuang)是將(jiang)包裝(zhuang)袋內抽成(cheng)低(di)真空(kong)(kong)(kong)(kong)后(hou)，再行封口。經真空(kong)(kong)(kong)(kong)包裝(zhuang)后(hou)的產(chan)品(pin)可縮小體(ti)積；使(shi)包裝(zhuang)物品(pin)達到防(fang)(fang)潮、防(fang)(fang)霉、防(fang)(fang)污染、防(fang)(fang)氧化、防(fang)(fang)銹(xiu)的目(mu)(mu)次。目(mu)(mu)前國(guo)際(ji)運(yun)輸多為海運(yun)，一(yi)般在海上(shang)漂泊時間為10~50天。因各地(di)濕度(du)、溫度(du)不同(tong)，同(tong)時各大(da)洋內濕度(du)較大(da)，工(gong)件極容易(yi)生銹(xiu)，故它是一(yi)種(zhong)切(qie)實有(you)(you)效(xiao)，行之可行的長途防(fang)(fang)生銹(xiu)措施(shi)。