所有進出口(kou)包裝(zhuang)箱必(bi)須要有真空(kong)(kong)(kong)包裝(zhuang)，其工藝特(te)點為(wei)(wei)(wei)工件與木箱之間增(zeng)加一(yi)只真空(kong)(kong)(kong)包裝(zhuang)套，通常(chang)為(wei)(wei)(wei)鋁泊紙，并加上幾層緩(huan)沖材料，真空(kong)(kong)(kong)包裝(zhuang)是將包裝(zhuang)袋內抽成低真空(kong)(kong)(kong)后(hou)，再行(xing)封口(kou)。經真空(kong)(kong)(kong)包裝(zhuang)后(hou)的產(chan)品(pin)可縮小體積；使包裝(zhuang)物(wu)品(pin)達到防(fang)(fang)潮(chao)、防(fang)(fang)霉、防(fang)(fang)污染、防(fang)(fang)氧化、防(fang)(fang)銹(xiu)的目次(ci)。目前國際運輸(shu)多(duo)為(wei)(wei)(wei)海運，一(yi)般在海上漂(piao)泊時(shi)(shi)間為(wei)(wei)(wei)10~50天。因各地濕(shi)(shi)度、溫度不(bu)同(tong)，同(tong)時(shi)(shi)各大洋內濕(shi)(shi)度較大，工件極容易生(sheng)銹(xiu)，故(gu)它是一(yi)種(zhong)切實有效，行(xing)之可行(xing)的長途防(fang)(fang)生(sheng)銹(xiu)措施。