Hualan Wang

2 Patents

• US120608802024

  Self-lubricating Plunger, Bushing for Self-lubricating Plunger and Method for Manufacturing Same

  XIAMEN JJD MACHINERY CO., Ltd

  0 cites
• US119190672024

  Sand Core Structure for Die-casting

  XIAMEN JJD MACHINERY CO., Ltd.

  0 cites