ISW horizontal series pipeline centrifugal pump IRG vertical series pipeline centrifugal pump IRG explosion-proof pipeline centrifugal pump IHG stainless steel series pipeline centrifugal pump IRG vertical series pipeline centrifugal pump IHW stainless steel series pipeline centrifugal pump ISW horizontal series pipeline centrifugal pump XBD vertical single stage series fire pump XBD vertical multi-stage series fire pump XBD single stage horizontal series fire pump XBD series fire control water supply equipment BZ type self suction centrifugal water pump ZW type self suction centrifugal sewage pump ZX series split type self priming pump SG ordinary type pipeline pump SGR hot water pipeline pump W type screw pum W type flange type vortex pump HZ stainless steel self-priming pump HZ centrifugal type stainless steel pump GW pipeline sewage pump LW pipeline sewage pump GDL vertical multistage pipeline pump GDL vertical multi-stage intelligent pump CDL/CDLF stainless steel light vertical multistage centrifugal pump CHL segmental multi-stage centrifugal pump CHL cylinder type stainless steel centrifugal pump Non negative pressure (constant pressure) constant pressure frequency conversion water supply system TZR/TZRW series pipeline pump GD type pipeline centrifugal pump JL Taiwan pipe pump WL Taiwan pipe pump DBZ Mingdong centrifugal single-phase pump BZ Mingdong centrifugal three-phase pump CL-SPG shield pipeline pump TZT standard centrifugal pump