制作链锯确实无需高深科技，只是用传统的螺丝螺母将塑料手柄和金属链条加以组合。
There is no particularly special technology needed to make a chainsaw. It's really just plastic and metal parts screwed together with old-fashioned nuts and bolts.
他用金属丝把链条的一头缚在钩上。
配用蒸汽引射装置后，可达到一种炉型适应多煤种的目的：与链条炉排比较，具有结构简单，金属耗量少等优点。
With a pilot steam injection device a better fuel adaptability can be achieved. As compared with chain grate stoker, it has the advantages of simple structure and less metal consumption.
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