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1·It would cost nothing to laydown if it were not.

即使不行，也不会有什么损失。

2·I now quit altogether public affairs and I laydown my burden.

现在我完全退出了公众事务，放下了我的负担。

3·Carbon-laydown occurs seriously in diesel engines on SCR electric drilling rigs during underload Performance, which affects the reliability and efficiency of the rigs.

SCR电驱动钻机的柴油发电机组所使用的柴油机，在低负荷运行时结碳严重，直接影响钻机的可靠性和经济性。

4·Failure cause of mechanical sealing of high temperature screwed pipe for GA123A pump is analyzed. It is showed that the causes of the sealing failure are scale deposit and carbon laydown in pipe.

对GA123A泵的高温波纹管式机械密封的失效原因进行了分析，证实热油泵的密封故障是由于波纹管内侧水垢和积碳引起。