underclay翻譯，underclay的意思，underclay同義詞，underclay的反義詞，underclay短語詞匯

詞語：underclay

underclay的意思

underclay 底粘土;底土;煤層下底粘土層;底黏土;underclay limestone 淡水石灰岩;底黏土石灰岩;