etch mark

Based on measurement data of the glacial mark on roche mountonnee in TianshanMountains, this paper mainly discusses the glacial-geomorphic process, formative mecha-nism in modern-glacier.

本文根据羊背石上的冰蚀痕迹的资料，着重探讨了其冰蚀痕迹分布规律和冰底动力过程。

This paper describes the track-etch dosimetry system used by the National Radiological Protection Board for measuring radon concentrations in dwellings and in workplaces.

文章描述了NRPB用于测量居室和工作场所氡浓度的径迹蚀刻剂量学体系 ,并考虑了适用于大规模评价吸入室内空气中氡的衰变子体所致危险度的理想氡剂量学体系所应该满足的原则 。