KB系列伺服行星减速机 PGH142-L1 28-110-145-M8 PGH142-L1 28-110-145-M8-8B PGH142-L2T 28-110-145-M8 PGH142T-L2 28-110-145-M8-8B 孔PGH142-L1 28-110-145-M8 孔PGH142-L1 28-110-145-M8-8B 孔PGH142T-L2 28-110-145-M8 孔PGH142T-L2 28-110-145-M8-8B