KB系列伺服行星减速机PGH142-L1 42-114.3-200-M12-12B 180WZ LR120 PGH142-L2 42-114.3-200-M12-12B 180WZ LR120 孔PGH142-L1 42-114.3-200-M12-180WZ-12B LR120 KCZ35 孔PGH142-L2 42-114.3-200-M12-180WZ-12B LR120 KCZ35