单词	山字钩
释义	山字钩医double hook
随便看	concave setting lever concave-setting lever concealed anterograde penetration concealed antigen concealed arch concealed area concealed articles Concave shape concave-shaped compact concave shapes concave shear concave sheath concave side concave side of blade concave simples method concave slide concave slide shoe for ball concave slope concave slope in open pit concave solid cutter concave space Concave spherical mesh concave spherical mirror concave spherical substrate concave spherical surface