求翻译：换向时炉温调节阀先关小,换向完成后再缓慢开大,和大炉温度控制回路相结合使换向后的炉温在短时间内达到设定温度是什么意思？

Furnace temperature control valve to the first off small, change to complete before slowly open, and furnace temperature control loop combination for back of the furnace temperature reaches the set temperature in a short period of time

When you switch over to oven temperature regulating valve is small, first to complete before the slow, and a large oven temperature control circuit to switch a combination of the following in a short time oven temperature reaches the set temperature

When commutation the furnace temperature regulating valve closes first slightly, after the commutation completes slowly opens again in a big way, unifies after the big stove temperature control return route enables the commutation the furnace temperature to achieve the hypothesis temperature in a sh

When reversing down the temperature regulating valves, slow opening after reversing is complete, and the great combination of furnace temperature control circuit of temperature within a short time after the reversal has reached the set temperature

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