网球高压球是一种在头上用扣压的动作完成的一种击球方法；它是从头的上方把球扣到对方场区，故又称杀球，其落点准、力量大，高压球是一项绝对的强攻性技术；根据对方挑过来的球的高低程度不同，高压球可分为落地高压和凌空高压两种。
结论高压球囊扩张术治疗良性输尿管多节段狭窄安全有效。
Conclusion High pressure balloon catheter dilation is an safe and effective procedure for patients with multi-segment benign ureterostenosis.
目的探讨高压球囊扩张术治疗良性输尿管多节段狭窄的疗效。
Objective To investigate the therapeutic effect of high pressure balloon catheter dilation on multi-segment benign ureterostenosis.
然而，当在第三盘将很容易的高压球打下网之后又一次被穆雷破发，西班牙人的势头戛然而止。
The Spaniard's momentum was halted in the third game however when he missed an easy overhead into the net to give Murray another break.
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