Ju is a ball, the ball is made of leather with the leather ball plugged in with the hair.
鞠是一种皮球，球皮用皮革做成，球内用毛塞紧。
In some cases, a ball or dart is plugged to block circulation through the tool string and enable the application of the release pressure.
在某些情况下，用一个球或镖进行封堵，以便将通过工具管柱的循环切断，并使得能施加释放压力。
In some cases, a ball or dart is plugged to block circulation through the tool string and enable the application of the release pressure.
在某些情况下，用一个球或镖进行封堵，以便将通过工具管柱的循环切断，并使得能施加释放压力。
应用推荐