| 摘要 |
<p>A gas-inlet attachment includes an air-tightly sealed pressure differentiator in the mouthpiece of a gas charger, wherein the pressure differentiator includes a valve-opener slidably and air-tightly connectable to the check valve in the cock with a pressure differentiating space interposed therebetween, thereby enabling the check valve to be biased in its opening direction under the differentiated pressure provided by the pressure differentiator.</p> |
