1. Never use the oxy-acetylene unless you have been [?] by a teacher.

   2. The acetylene bottle is ([?]) and the oxygen bottle is (black).

   3. When setting up: Open acetylene bottle first then the [?] bottle.

   4. Always leave the bottle [?] on the acetylene bottle.

   5. Screw down regulator caps till correct [?] is determined.

   6. Open the [?] control on the handset, then introduce a small amount of oxygen prior to igniting the gas.

   7. Always wear oxy-acetylene goggles to [?] the eyes when welding.

   8. Adjust flame till excess [?] disappears.

   9. When closing down: Turn [?] [?], and both controls on the [?].