symmetrical fold
常見例句
- Fan-like cleavage means cleavages at axis faces occurring in the core of a fold, which spreads in fan like and shaped like branches of trees or straight with good symmetrical patterns.
扇狀劈理是在褶曲核部發(fā)育的軸麪劈理，呈扇形展佈，爲破劈理，劈理間距不等，呈樹枝狀或平直狀，對稱性較好。
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