内容正文:
Unit 6—(4)
Using Tools Properly
Warm-up
Ask and answer in pairs.
1. What are the two types of tools?
2. Can you list some power tools?
3. What should we do when using power tools?
Let’s see how we can answer these questions.
1. What are the two types of tools?
Hand tools and power tools.
2. Can you list some power tools?
Nail gun, electric welder, hammer drill, electric riveter,
electric chainsaw and air compressor.
3. What should we do when using power tools?(Open)
We should use them correctly and keep them in good condition by checking them regularly.
Tools play an important part (起重要作用) in our life and in the development of production.
The craftmen always use hand tools in manual operations (手工操作).
Cutting and pinching tools include knives, scissors, hand saws, drills and drill bits(切夹工具:如刀具、剪刀、手锯、钻和钻头) .
Common Hand Tools
Let’s review key sentences of the passage together.
3. Driving tools include hammers which are used to drive nails, crowbars to remove nails or heavy objects, screwdrivers to insert and tighten, or to loosen and remove screws, and spanners to twist nuts and bolts.(驱动工具包括用砸钉子的锤子、用来卸下钉子或重物的撬棍、用来插入和拧紧或松开和拆卸螺丝的螺丝刀,以及用来扭转螺母和螺栓的扳手。)
Shaping tools include grinding wheels and files.(成型工包括砂轮和锉刀等。)
4. There are still more hand tools which are commonly used.
(还有更多常用的手动工具。)
5. They’re used every day at work sites. (它们每天都在工作场所使用)
6. Safety is also very important in using them. (使用时安全也非常重要)
7. Hand tools should be properly used and maintained at all times.
(应始终正确使用和维护手动工具)
8. This helps to prevent accidents and injuries.(这有助于防止事故和伤害)
Let’s review the passage.
A hand tool is any tool that is powered by hand rather than a motor. Categories of hand tools include spanners, pliers, cutters, files, hammered tools, screwdrivers, saws, drills and knives.
手动工具的历史
手动工具是指任何由手动而非电机驱动的工具。手动工具的种类包括扳手、钳子、刀具、锉刀、锤击工具、螺丝刀、锯子、钻头和刀具。。
The History of Hand Tools
Hand tools have been used b