问题2:美规电热水壶长度是否为1.8米到2.1米,UL 1082中描述为:Coiled(retractile) detachable powersupply cord Measured with the cord relaxed on a horizon tal surface.Measuredwiththecordfully extended, thel ength is not to exceed 7.0ft (2.1m)and isnot to bel ess than6.0ft (1.8m). 他先写0.9米但是note b有说上面描述,为什么美规水壶电线可以那么长?