It is infrequence in China that the weld high - temperature high - pressure hydrogenation pipe is cracked short time.高温高压 临氢管道焊缝迅速发生裂纹,国内罕见....

frequence的音标：frequence的英式发音音标为：['fri:kwəns]frequence的美式发音音标为：['frikwəns]...

n.频数，频繁...

infrequence的音标：infrequence的英式发音音标为：[ɪn'fri:kwəns]infrequence的美式发音音标为：[ɪn'frikwəns]...

n.很少发生，罕见...

Diopside rock is a functional raw material for high frequence porcelain.透辉石矿是高频瓷的一种实用原料.After setting, we can use following command to check if the core frequence is changed.设定完后可以利用以下命令来查看是否工作频率已改变.The design of high - ...