Jilei Chang

2 Patents

• US123593872025

  Soft Soil Foundation Single-hole Depth Air Compression Drainage Device and Working Method Thereof

  Ningbo China Communications Water Transportation Design And Research Co., Ltd.

  0 cites
• US122644482025

  Soft Soil Foundation Porous-depth Air Compression Drainage Device and Working Method Thereof

  Ningbo China Communications Water Transportation Design And Research Co., Ltd.

  0 cites