所有(you)進出口包裝(zhuang)箱必須要有(you)真(zhen)空(kong)(kong)(kong)包裝(zhuang)，其(qi)工(gong)藝(yi)特點為(wei)工(gong)件(jian)與木箱之(zhi)間(jian)增加一(yi)只真(zhen)空(kong)(kong)(kong)包裝(zhuang)套(tao)，通常為(wei)鋁泊(bo)(bo)紙，并加上幾層緩(huan)沖(chong)材料，真(zhen)空(kong)(kong)(kong)包裝(zhuang)是將包裝(zhuang)袋內(nei)抽成低(di)真(zhen)空(kong)(kong)(kong)后(hou)，再行(xing)(xing)封(feng)口。經真(zhen)空(kong)(kong)(kong)包裝(zhuang)后(hou)的產品(pin)可縮小體積；使包裝(zhuang)物(wu)品(pin)達到(dao)防(fang)(fang)潮(chao)、防(fang)(fang)霉、防(fang)(fang)污染、防(fang)(fang)氧(yang)化、防(fang)(fang)銹(xiu)的目次。目前國際運輸多為(wei)海運，一(yi)般在海上漂泊(bo)(bo)時間(jian)為(wei)10~50天。因各地濕度(du)(du)、溫度(du)(du)不同，同時各大洋內(nei)濕度(du)(du)較大，工(gong)件(jian)極(ji)容(rong)易(yi)生銹(xiu)，故它(ta)是一(yi)種(zhong)切實有(you)效，行(xing)(xing)之(zhi)可行(xing)(xing)的長途防(fang)(fang)生銹(xiu)措施。