With further water flooding, pollutions of water flooding well continuously push and cumulate in depth of the formation, which leads to the injection capability decreasing.
随着注水开发的不断深入，注水井的污染不断向地层深部推进并在深部累积，致使注水能力下降。
2
A push button connection for an injection device comprising a push button (10) and a driving part (20).
一种用于注射设备的按钮连接，包括按钮(10)和驱动部件(20)。
3
The utility model relates to a medical device, and particularly to a pushing device which can push the puncture point after needle withdrawal in intravenous injection.