Luo Qingyu

Technology for drawing plastics-lined composite metal pipe with sandwich transition structure material

Multiunit plastic-lined wire aluminium alloy pipe

End sealed sleeving type locking tube joint

Clasp built-in pipe joint

Double ring type locking quick-mounting flange for pipeline

Cutting ferrule type quick-mounting flange for pipeline

Sandwiched gum compound plastic lining aluminium alloy tube

Aluminium/plastic composite pipe connector

Press-ring type end face sealing quick installed pipe joint

End face sealed quick-mounting joint for pipeline