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discontinuity roughness
 discontinuity roughness
eng.geol. 不连续面粗糙度; 结构面粗糙度
| classification
 classification
gen. 类别
environ. 分类
IMF. 密级
interntl.trade. 船舶级别
labor.org. 区分规格
math. 分组,分类
met. 分粒

to phrases
discontinuity roughness
eng.geol. 不连续面粗糙度; 结构面粗糙度
discontinuity roughness classification
: 4 phrases in 2 subjects
Engineering geology3
Technology1