LJ48A4-15-J/EM,LJ48A4-15-J/DM,LJ48A4-15-J/FM,LJ48A4-15-J/CM,SD-3020,SD-20电感式接近开 LJ48A4-15-J/EM,LJ48A4-15-J/DM,LJ48A4-15-J/FM,LJ48A 无锡市昌林自动化科技有限公司