A plurality of small shaping orifices are evenly distributed on the excircle surface of the blades.叶片的外圆表面上均匀分布着多个小的型孔....

excircle的音标：excircle的英式发音音标为：['eksˌsɜ:kəl]excircle的美式发音音标为：['eksˌsɜkəl]...

n.外切圆，旁切圆...