1. The movable ball seal, having no centralized detrition, sturdiness and endurance… 活动式的球型密封无集中磨损，坚固耐用。
2. This area is vertically divided into detrition development zone, fractures, corroded pores and caverns development zone and tight zone. 纵向上可分为风化破碎发育带，裂缝、溶孔、溶洞发育带和致密带。
3. The reservoir can be identified in section as weathered zone (detrition belt), fracture 变质岩储层在纵向上可分为：风化破碎带，裂缝、溶孔、溶洞发育带和致密带。
英英解释
n.
1. erosion by friction
2. the wearing down of rock particles by friction due to water or wind or ice
3. effort expended in moving one object over another with pressure
