4WEH10E/-E/T/ET,4WEH10G/-E/T/ET,4WEH10H/-E/T/ET,华德型换向阀 4WEH10J/-E/T/ET,4WEH10D/-E/T/ET,4WEH10D/OF-E/T/ET, 4WEH10C/-E/T/ET,4WEH16E/-E/T/ET,4WEH16G/-E/T/ET, 4WEH16H/-E/T/ET,4WEH16J/-E/T/ET,4WEH16D/-E/T/ET, 4WEH16D/OF-E/T/ET,4WEH16C/-E/T/ET,4WEH25E/-E/T/ET, 4WEH25G/-E/T/ET,4WEH25H/-E/T/ET,4WEH25J/-E/T/ET, 4WEH25D/-E/T/ET,4WEH25D/OF-E/T/ET,4WEH32E/-E/T/ET, 4WEH32G/-E/T/ET,4WEH32H/-E/T/ET,4WEH32J/-E/T/ET, 4WEH32D/-E/T/ET,4WEH22/-E/T/ET 单头,4WEH22/-E/T/ET 双头, 型号中有S或S2=带节流阀,型号中有D3=带减压阀,型号中有P4.5=带预压阀,