“死刑电椅”可以翻译为 “electric chair for execution” 或者更简洁地表达为 “the electric chair” （在上下文明确是用于执行死刑的场景时）。例如：
The electric chair for execution was once a common method of capital punishment in some states. （死刑电椅曾是一些州常见的死刑执行方式。）
The convicted criminal was sentenced to die in the electric chair. （这名被判有罪的罪犯被判处死刑，将在电椅上执行。）