跪求高手翻譯！ 自助式打氣機 歡迎使用 注意：出氣量較大，建議先試壓再充氣 請問英文如何翻譯？謝謝?

A self-service air compressor,welcomed.
Causions:-Amount of "gas-explosion" released high;
Recommend to test pressure control before inflation.

自助式打氣機 歡迎使用 注意：出氣量較大，建議先試壓再充氣

(This is a) self-operated air pump and you are welcome to use it (at your own risks).

CAUTIONS: high air capacity in action! please test it out before inflating.

謝謝兩位！很想兩位都給予評分QAQ