所有(you)進(jin)出口(kou)包(bao)(bao)裝(zhuang)箱必須(xu)要有(you)真(zhen)空(kong)(kong)包(bao)(bao)裝(zhuang)，其工藝特點為工件(jian)(jian)與木(mu)箱之(zhi)(zhi)間增加一(yi)只真(zhen)空(kong)(kong)包(bao)(bao)裝(zhuang)套，通(tong)常為鋁泊(bo)紙(zhi)，并加上幾層緩沖(chong)材料，真(zhen)空(kong)(kong)包(bao)(bao)裝(zhuang)是(shi)將包(bao)(bao)裝(zhuang)袋內抽成低真(zhen)空(kong)(kong)后(hou)，再行(xing)封口(kou)。經(jing)真(zhen)空(kong)(kong)包(bao)(bao)裝(zhuang)后(hou)的產品可縮小(xiao)體積；使包(bao)(bao)裝(zhuang)物品達到防(fang)潮(chao)、防(fang)霉(mei)、防(fang)污(wu)染、防(fang)氧(yang)化、防(fang)銹的目次。目前國際運輸多為海運，一(yi)般在海上漂泊(bo)時(shi)間為10~50天。因(yin)各地濕(shi)度(du)、溫度(du)不同(tong)(tong)，同(tong)(tong)時(shi)各大洋內濕(shi)度(du)較大，工件(jian)(jian)極容(rong)易生銹，故它是(shi)一(yi)種切實(shi)有(you)效，行(xing)之(zhi)(zhi)可行(xing)的長途(tu)防(fang)生銹措施。