“lead bullion”造句，怎麼用lead bullion造句

1、Finite element simulation of rolling lead bullion with different hollow ratio

3、The paper introduced the practice in realizing stable and high output continuously by the rational modification of operation and equipment of the lead bullion system in No.

2、Britannia Refined Metals Ltd. was built in 1931 to refine the lead bullion produced at the mine in Queensland,Australia.

4、The paper introduced the practice in realizing stable and high output continuously by the rational modification of operation and equipment of the lead bullion system in No. 3 Smelter, Shuikoushan.