这正是自行车打气筒的情况。

And that really is the bicycle pump.

我们使用打气筒把气打进轮胎。

We use a pump to blow air into our tires.

上次我举打气筒的例子不太正确。

That example I gave last time with the bicycle pump was not quite the right example.

自产：皮绳、护手、护膝、打气筒座垫等防护用品。

Sell: leather rope, hand, knee pads, pump seat cushion protective equipment.

我随身带着修理工具和打气筒，这样我可以随时补胎。

I carried a repair kit12 and pump with me so I could mend tires on the go.