焊接造成的内部气孔使环形锯丝在该处产生疲劳断裂。
The holes in welding area mainly cause the fatigued wire to break.
用夹具和环形锯将标识板切割成中等密度的胶合板，字母是用PVC板做成的。
The signboard was cut from medium-density-overlay plywood (MDO) using jig and band saws, and the lettering is comprised of PVC.
我曾听说有个人买了一个打折的电动环形锯，第二天不慎切断了自己的两个手指，但他一点儿也不后悔，因为那锯的确很便宜。
And I once heard of a man who bought an electric circular saw as a bargain and cut off two of his fingers the next day. But he had no regrets: the saw had been truly cheap.
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