所(suo)有(you)(you)(you)進出口(kou)包(bao)裝箱必須要有(you)(you)(you)真(zhen)空(kong)(kong)包(bao)裝，其工藝特點為工件與(yu)木箱之(zhi)間(jian)增(zeng)加(jia)一只真(zhen)空(kong)(kong)包(bao)裝套，通(tong)常(chang)為鋁泊(bo)(bo)紙(zhi)，并(bing)加(jia)上幾層緩沖材料，真(zhen)空(kong)(kong)包(bao)裝是將包(bao)裝袋(dai)內抽(chou)成(cheng)低真(zhen)空(kong)(kong)后(hou)，再行(xing)封口(kou)。經真(zhen)空(kong)(kong)包(bao)裝后(hou)的產品可縮(suo)小體積；使包(bao)裝物品達(da)到防(fang)潮、防(fang)霉、防(fang)污染、防(fang)氧化、防(fang)銹的目(mu)次。目(mu)前(qian)國際運輸多為海運，一般在(zai)海上漂泊(bo)(bo)時(shi)間(jian)為10~50天。因各(ge)地濕(shi)度、溫(wen)度不同(tong)，同(tong)時(shi)各(ge)大洋內濕(shi)度較大，工件極容(rong)易生銹，故它是一種切實有(you)(you)(you)效，行(xing)之(zhi)可行(xing)的長途(tu)防(fang)生銹措施(shi)。