The Supporting Electronics System is a very important Part of the H-clock.
辅助电子学系统是氢钟的一个非常重要的部分。
The distribution of the rolling pressure on H-beam is a very important problem.
h型钢的轧制压力分布是研究人员非常关心的问题。
The distribution of the rolling pressure on H-beam is a very important problem.
h型钢的轧制压力分布是研究人员非常关心的问题。
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