所有(you)(you)進出口包(bao)(bao)裝箱(xiang)必須要有(you)(you)真(zhen)(zhen)空(kong)包(bao)(bao)裝，其工(gong)(gong)藝特點為(wei)(wei)工(gong)(gong)件與木(mu)箱(xiang)之間(jian)增加一只真(zhen)(zhen)空(kong)包(bao)(bao)裝套，通常為(wei)(wei)鋁泊(bo)紙，并加上幾層(ceng)緩沖材(cai)料，真(zhen)(zhen)空(kong)包(bao)(bao)裝是將(jiang)包(bao)(bao)裝袋內(nei)抽成低真(zhen)(zhen)空(kong)后，再(zai)行(xing)(xing)封口。經真(zhen)(zhen)空(kong)包(bao)(bao)裝后的產品(pin)可縮小體積；使包(bao)(bao)裝物品(pin)達到防潮、防霉、防污(wu)染(ran)、防氧(yang)化、防銹(xiu)的目(mu)次。目(mu)前國際運(yun)輸多為(wei)(wei)海運(yun)，一般在海上漂泊(bo)時間(jian)為(wei)(wei)10~50天。因(yin)各(ge)地濕(shi)度、溫度不同，同時各(ge)大(da)洋內(nei)濕(shi)度較大(da)，工(gong)(gong)件極容易生銹(xiu)，故它是一種切實有(you)(you)效(xiao)，行(xing)(xing)之可行(xing)(xing)的長途防生銹(xiu)措施(shi)。