This rubber ball doesn't blow up easily.
这个橡皮球不易充气。
Mechanism: Direct blow to anterior thigh (Football/basketball) or from a ball traveling at a high rate of speed (field hockey/lacrosse).
机制：直接打幢击到大腿前侧（足球/篮球）或高速飞过来的球（曲棍球/长曲棍球）。
Except for such features as wrong operation prevention, stem blow-out proof, mounting, pad provided, the metal to metal sealed ball valves made by WILLIAMSON possess the following unique features.
金属硬密封球阀除了具有防止误操作、防止阀杆飞出、设置驱动装置安装平台等结构特点外，还具有如下独特的特点。
Except for such features as wrong operation prevention, stem blow-out proof, mounting, pad provided, the metal to metal sealed ball valves made by WILLIAMSON possess the following unique features.
金属硬密封球阀除了具有防止误操作、防止阀杆飞出、设置驱动装置安装平台等结构特点外，还具有如下独特的特点。
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