所有進出(chu)口包(bao)裝(zhuang)箱(xiang)必須要有真空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)，其工(gong)(gong)藝特點為(wei)工(gong)(gong)件(jian)與木箱(xiang)之間增(zeng)加一(yi)只真空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)套(tao)，通常(chang)為(wei)鋁泊紙(zhi)，并加上幾層緩沖材料(liao)，真空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)是將包(bao)裝(zhuang)袋內(nei)抽成低真空(kong)(kong)(kong)(kong)后，再行封口。經真空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)后的產(chan)品(pin)可縮小體積；使(shi)包(bao)裝(zhuang)物(wu)品(pin)達(da)到防(fang)(fang)潮、防(fang)(fang)霉、防(fang)(fang)污染、防(fang)(fang)氧化(hua)、防(fang)(fang)銹的目(mu)次。目(mu)前國際運(yun)輸多為(wei)海(hai)運(yun)，一(yi)般在海(hai)上漂泊時間為(wei)10~50天(tian)。因各(ge)地濕度(du)(du)、溫度(du)(du)不(bu)同(tong)，同(tong)時各(ge)大洋內(nei)濕度(du)(du)較(jiao)大，工(gong)(gong)件(jian)極(ji)容易生銹，故它是一(yi)種切實有效，行之可行的長途(tu)防(fang)(fang)生銹措施。