semi-circular arch

半椭 圆形拱,semi... ... ) semi-elliptical arch 半椭 圆形拱 ) semi-circular arch 半圆形拱 ) Circular arches 圆形拱 ...

美英加陆军规格_馆档网 ... "半圆"," semi-circle" "半圆拱"," semi-circular arch" "半圆周"," semi-circumference" ...