Learn Hardcore Japanese: kyuukyuuhou de ha, siketu, kidouibutuzyokyo, tanka hansou wo rensyuusuru. - In first-aid training, we practice bleeding control, airway clearing, and stretcher transport.

Breakdown of kyuukyuuhou de wa, shiketsu, kidouibutsujokyo, tanka hansou o renshuusuru.

What does 救急法では mean here, and why are there two particles, で and は?

救急法 means first aid or first-aid methods/procedures.

The combination では is で + は:

So 救急法では means something like:

It sets the scene for what follows. The sentence is saying that in the area of first aid, these are the things that get practiced.

How do you read the main words in this sentence?

Here are the common readings:

A lot of these are technical or formal compounds, so they use on-yomi readings.

Why is there only one を even though there are three things being practiced?