TYPE‑TEST CERTIFICATE FOR SPECIAL EQUIPMENT (PRESSURE PIPELINE COMPONENTS)

TYPE‑TEST CERTIFICATE FOR SPECIAL EQUIPMENT (PRESSURE PIPELINE COMPONENTS)

QUALITY MANAGEMENT SYSTEM CERTIFICATE

MANUFACTURE CERTIFICATE OF ANTI‑CORROSION PIPING COMPONENT

UTILITY MODEL PATENT CERTIFICATE‑A STRAIGHT‑THROUGH DIAPHRAGM VALVE

UTILITY MODEL PATENT CERTIFICATE‑WEAR‑RESISTANT AND CORROSION‑RESISTANT DOUBLE‑SEAL LINED‑RUBBER GAT

UTILITY MODEL PATENT CERTIFICATE‑CORROSION‑RESISTANT AND WEAR‑RESISTANT LINED‑RUBBER PNEUMATIC PULSA

UTILITY MODEL PATENT CERTIFICATE‑WATER‑HAMMER‑RESISTANT CORROSION‑RESISTANT SINGLE‑FLAP CLAMP CHECK

UTILITY MODEL PATENT CERTIFICATE‑PLUG VALVE

UTILITY MODEL PATENT CERTIFICATE‑TWO‑WAY SOFT‑SEAL CORROSION‑RESISTANT FLANGE BUTTERFLY VALVE

UTILITY MODEL PATENT CERTIFICATE‑GEMELLI‑TYPE CORROSION‑RESISTANT PNEUMATIC PULSATING DIAPHRAGM VALV

UTILITY MODEL PATENT CERTIFICATE‑A BALL VALVE WITH INTEGRAL BALL ROD AND FLUORINE‑LINED FIXING