求翻译：烘烤温度80±5℃，真空度≤-90Kpa（烘烤开始时、过程中各抽检一次烘箱氮气置换，氮气置换次数6次，每次保持15—20分钟，间隔6小时）烘烤时48±2 h，取出温度≤45℃是什么意思？

Baking temperature of 80 ± 5 ° C, vacuum degree ≤-90kpa (baking the beginning of the process of sampling time oven nitrogen replacement, nitrogen replacement 6 times, each time for 15-20 minutes, 6 hours apart) Bake 48 ± 2 h, remove the temperature ≤ 45 ° C

baking temperature 80± 5° C, vacuum Kpa = -90, browning at the beginning, in the course samples a oven nitrogen replacement, the nitrogen replacement number 6 times, each time 15 - 20 minutes, every 6 hours) when baking 48 ± 2 H, and remove temperature ≤ 45° C

The roasting temperature 80±5℃, the vacuum degree ≤-90Kpa (roasting starts when, in process spot-checks a time drying oven nitrogen replacement respectively, nitrogen replacement number of times 6 times, each time maintains 15-20 minute, is separated 6 hours) bake when 48±2 h, takes out the temperat

Baking temperature of 80 ± 5 ℃, vacuum ≤ -90Kpa (baking at the beginning, during the sampling time oven replacement of nitrogen, nitrogen replacement number 6, 15-20 minutes at a time, every 6 hours) 48 ± 2 h when baking, remove the temperature ≤ 45 ℃

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