Into a shop selling warning signs for construction sites, where I bought a "Danger! High voltage!" placard.
到了一个买工地警示牌的店里，我买了一个“高压，危险！”
Red is widely used to indicate danger (high voltage signs, traffic lights).
红色广泛用于指示危险(高压电警示、交通灯)。
A hidden danger in the high voltage power supply of the ELA-120/6 electron beam welding machine is found, countermeasures to remove the danger are discussed and an ameliorated sample is made.
分析了EAL-120/6型电子束焊机高压电源存在的安全隐患，提出了消除隐患的措施，给出一种改进实例。
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