所有(you)(you)進出口包(bao)(bao)裝(zhuang)箱(xiang)(xiang)必須(xu)要有(you)(you)真(zhen)空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)，其工(gong)藝特點(dian)為工(gong)件與木箱(xiang)(xiang)之間增加一只(zhi)真(zhen)空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)套，通常為鋁泊紙，并加上幾層(ceng)緩沖材(cai)料(liao)，真(zhen)空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)是將包(bao)(bao)裝(zhuang)袋內抽成低真(zhen)空(kong)(kong)(kong)后(hou)，再行(xing)封口。經真(zhen)空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)后(hou)的(de)產品可(ke)縮小體積；使包(bao)(bao)裝(zhuang)物(wu)品達到防潮(chao)、防霉、防污(wu)染(ran)、防氧(yang)化、防銹的(de)目(mu)次(ci)。目(mu)前國際運(yun)輸多為海運(yun)，一般在海上漂泊時間為10~50天。因各地濕度、溫度不(bu)同(tong)，同(tong)時各大(da)洋內濕度較大(da)，工(gong)件極容易生銹，故它是一種(zhong)切實有(you)(you)效(xiao)，行(xing)之可(ke)行(xing)的(de)長途防生銹措施。