1 . 配料
burden material 炉料burdening配料burgers circuit 伯格斯回路
2 . 配料比
burden ratio 进炉料burdening配料比Bureau of Standards 标准局
3 . 进炉料
卷焊钢管burden ratio进炉料burdening配料比Bureau of Standards
4 . 增加负担
in addition , the risk also exists that a state will use what appears to be nondiscriminatory legislation as covert means of burdeningout-of-state businesses .另外还有一种危险是,某一州可能利用表面上显得不具歧视性的立法,作为一种为州外商业增加负担的隐秘手段。