The third company, General Electric, will sell an LED equivalent to a 40-watt bulb this year, but it will not have a 60-watt replacement ready until 2011.
另外一家巨头通用电器今年将销售一款相当于40W白炽灯泡的LED灯泡；但直到2011年以前，通用电器都不会推出替代60W白炽灯泡的型号。
In this paper the general expression of the filling factor of spherical storage bulb for the hydrogen maser is derived.
本文推导了氢原子激射器球形贮存泡填充因子的普遍表达式。
Some problems as incorrect adjustment on the degree of superheat, general failure of the thermometer bulb, matching of the capacity and freezing of the TEV are presented.
介绍了热力膨胀阀应用于空调制冷系统的几个问题：过热调整不当、感温包常见故障、容量匹配及膨胀阀冻结故障等。
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