扭力固定环KC-1、KC-2、KC-3、KC-4产品说明：通用机型KC-1SK-8230PSK-8240PSK-8250PSK-8230LSK-8230LSK-8230LSK-8230LFSK-8240LFKC-2SK-9231LSK-9231PSKD-7800LF通用机型KC-3SK-3220LSK-3280LSK-3220PSK-3280PBSD-6200LBSD-6600LBSD-6600LFBSD-6600PFBSD-6200PBSD-6600PKC-4BSD-3000BSD-3200BSD-3300SKD-2)