l-valve l阀

mitral l valve 二尖瓣 ; 僧帽瓣

control l valve 调节阀

multi-controlling L-valve 多控L阀

mitral l valve prolapse 二尖瓣脱垂

oil l valve 油阀

conical l valve 锥形阀

spherical l valve 球阀

bicuspidal l valve 二尖瓣