WINNER顺序阀 SC11A20AL
（透大气，直动型附止回阀）
SC17A20AL/SC17A20AC
SC17A20BL/SC17A20BC
SC17A20CL/SC17A20CC
SC17A20DL/SC17A20DC
SC17A20EL/SC17A20EC
SC17A20WL/SC17A20WC