永久界标 meaning in English

permanent monument

Note 7 - remarks as to the origin may take the form of a boring number and sample number in conjunction with a job number , a geologic stratum , a petrologic horizon or a location description with respect to a permanent monument , a grid system or a station number and offset with respect to a stated centerline and a depth or elevation
注7 -对于原状样的记号可以采用下面的形式,一个钻孔编号和一个样品编号联合一个工作编号,一个地质地层,一个岩石层位或者一个考虑为永久界标的原地描述,一个栅格系统或者一个测站编号和考虑到规定的中心线和深度或海拔的偏移量