国家/地区 中国（3）
IPC部
IPC大类
IPC小类
IPC
发明人 ZHAO S（3）
公开年 2021（3）
申请年 2019（3）
专利权人 CHINA PETROL.（2）

Capacitor, has film that is provided with two units of film that are respectively connected with first electrode and second electrode, and film whose two units is connected to pair of interdigital electrodes.

LOU Z, SHEN G, RAN W, ZHAO S, WANG D, YIN R

Standardized and batch production pipeline noise reduction device, has damping layer attached to outer wall of pipeline, sound absorption layer and vacuum layer, where vacuum layer is provided with front and rear clamping plates.

ZHAO S, YU J, SUN D, WU S, SU S, MA Y, ZHANG C

High molecular polymer used in drilling fluid, preferably fluid loss agent, comprises 2-acrylamido-2-methyl-propanesulfonic acid, acrylamide, methacrylic acid, dimethyl diallyl ammonium chloride and acryloxy isobutyl sulfonic acid.

WANG W, XU J, CHAI L, DONG X, ZHAO S, LI F