所有(you)進出口包(bao)裝箱(xiang)必須要有(you)真(zhen)空(kong)(kong)包(bao)裝，其(qi)工(gong)藝特點為(wei)(wei)工(gong)件(jian)與(yu)木箱(xiang)之間增加(jia)一只(zhi)真(zhen)空(kong)(kong)包(bao)裝套，通常為(wei)(wei)鋁泊(bo)紙(zhi)，并加(jia)上(shang)幾層(ceng)緩沖(chong)材料，真(zhen)空(kong)(kong)包(bao)裝是將(jiang)包(bao)裝袋內(nei)抽(chou)成(cheng)低真(zhen)空(kong)(kong)后(hou)，再行(xing)封口。經真(zhen)空(kong)(kong)包(bao)裝后(hou)的產品可縮小體(ti)積；使包(bao)裝物(wu)品達(da)到防潮、防霉、防污(wu)染、防氧化(hua)、防銹的目次。目前國際運輸多為(wei)(wei)海運，一般在海上(shang)漂泊(bo)時(shi)間為(wei)(wei)10~50天。因各地(di)濕度(du)、溫度(du)不同(tong)，同(tong)時(shi)各大(da)洋內(nei)濕度(du)較(jiao)大(da)，工(gong)件(jian)極(ji)容易生銹，故它是一種(zhong)切(qie)實(shi)有(you)效，行(xing)之可行(xing)的長途(tu)防生銹措施。