重量证明书 是出口商品交货结汇签发提单和进口商品结算索赔的有效凭证
The weight certificate is an effective document for the issuance of bills of lading after the delivery and settlement of foreign exchange for export commodities and for the settlement and claim of import commodities
以上为机器翻译结果，长、整句建议使用 人工翻译 。