The connection can be made by using the running surface of the paved cart as the horizontal datum.
连接时可以利用已铺好的大车运行轨道面作为水平基准。
Actually, floating datum is still horizontal datum, but the datum elevation of different CMP is variable.
实际上浮动基准面还是水平基准面，只是不同CMP的水平基准面高程可以变化。
The results were as follows. The horizontal datum and two-pass statics method gave minimum depth error on time section.
试验结果表明，采用水平基准面两步法静校正，时间剖面反演深度误差最小；
This paper aims at the solution of the problems in datum processing and accuracy evaluation of dynamic horizontal calibrating of the docking survey vessel.
本文主要是根据测量船码头动态水平标校的特点，研究解决数据处理和精度评定问题。
In migration processing, we usually require that migration datum is horizontal and that zero point for migration should be on the ground surface on which shot point and receiving points lie.
在作偏移处理时，一般要求偏移基准面是水平的，且偏移的零点应在激发和接收的地表。
So the establishing of(horizontal) control datum with appropriate precision standards systematically is the precondition to make sure the precision of ballastless track laying.
系统建立适宜精度标准的平面控制基准，是保障无碴轨道铺设精度指标顺利实现的前提。
Gearboxes shall be taken as the standard unit. To adjust bottom base by referring to horizontal subdivision section of gear box, box body processing datum plane or support of bottom base;
compressors 齿轮箱为基准机，进行底座调整时以齿轮箱水平剖分面、箱体机加工基准面或 底座支承为基准，同时兼顾压缩机和电动机侧水平仪。
Gearboxes shall be taken as the standard unit. To adjust bottom base by referring to horizontal subdivision section of gear box, box body processing datum plane or support of bottom base;
compressors 齿轮箱为基准机，进行底座调整时以齿轮箱水平剖分面、箱体机加工基准面或 底座支承为基准，同时兼顾压缩机和电动机侧水平仪。
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