1. Wood assisted Stephenson in the development of his safety lamp, which was first tested in 1815.

2. He used Stephenson's double gauze safety lamp up until the 1940s, and quoted to me the number of permitted gauze apertures.

3. The utility model relates to a safety lamp base with a clamp apparatus with improved structure.

4. The wind was strong. We struggled our way ahead with the help of a safety lamp.

5. The Contractor shall provide his personnel with various necessary safety tools or instrument, safety lamp, gas mask and oxygen supplying equipment in the area where harmful gas is possible to appear.