所(suo)有進出口包(bao)裝(zhuang)(zhuang)箱必須要有真(zhen)(zhen)空(kong)(kong)包(bao)裝(zhuang)(zhuang)，其工(gong)藝特點(dian)為(wei)工(gong)件與木箱之(zhi)間(jian)增加(jia)一只真(zhen)(zhen)空(kong)(kong)包(bao)裝(zhuang)(zhuang)套，通常為(wei)鋁(lv)泊紙，并加(jia)上幾層(ceng)緩沖材料，真(zhen)(zhen)空(kong)(kong)包(bao)裝(zhuang)(zhuang)是(shi)將包(bao)裝(zhuang)(zhuang)袋內抽成低真(zhen)(zhen)空(kong)(kong)后，再行(xing)封(feng)口。經真(zhen)(zhen)空(kong)(kong)包(bao)裝(zhuang)(zhuang)后的產品可(ke)縮小(xiao)體積(ji)；使包(bao)裝(zhuang)(zhuang)物品達(da)到防潮、防霉、防污染、防氧化、防銹(xiu)的目次。目前國際(ji)運輸多為(wei)海(hai)運，一般在海(hai)上漂泊時間(jian)為(wei)10~50天(tian)。因各地濕(shi)度、溫度不同(tong)，同(tong)時各大洋內濕(shi)度較大，工(gong)件極容易(yi)生銹(xiu)，故(gu)它(ta)是(shi)一種切實有效，行(xing)之(zhi)可(ke)行(xing)的長途防生銹(xiu)措施(shi)。