9.The seals of tubing spool and tubing hanger are classified as two types:vertical rubber seal and tapper metal seal.Users can select one of them upon their requirement.

• 油管四通和油管悬挂器分两种密封结构形式，一种是直座式橡胶密封，一种是锥座式金属硬密封，可根据不同需要确定其选用形式。