Across
- 1. a fine, powdery, binding material used in construction
- 5. serve to ignite this fuel-air mixture
- 6. a chemical cleaning and wetting agent
- 7. rock fragments use in constructions
Down
- 2. used to insulate electrical wire
- 3. solid or stranded metal where electricity passes through
- 4. a fusible metal alloy
- 6. used to provide heat and power