求翻译：中压缸进汽有以下优缺点：冲转时高压缸不进汽，而是待机组并网后才逐步向高压缸进汽，这种启动方式对控制胀差有利，可以不考虑高压缸胀差问题，以达到安全启动的目的。但启动时间较长，转速也较难以控制。采用中压缸进汽启动，高压缸无蒸汽进入，鼓风作用产生的热量使高压缸内部温度升高，因此还需引进少量冷却蒸汽。是什么意思？

Pressure cylinder inlet has the following advantages and disadvantages: the red switch to high-pressure cylinder inlet, but the standby group and the network and then progressively to the high pressure cylinder inlet, this startup mode to control the difference between a favorable expansion, you can

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Pressure in the cylinder inlet has the following advantages and disadvantages: rotation-impulsing for steam high pressure cylinders when not in, but gradually after MW grid-connected to the cylinder of high pressure steam, this boot method to control the differential expansion of benefits may not co

Presses the cylinder admission to have following good and bad points: Flushes transfers when high-pressured cylinder not admission, after but is waits the unit to incorporate only then gradually to the high-pressured cylinder admission, this start way to controls zhang the difference to be advantage