Preheat your oven to 400 degrees.
烤箱预热华氏400度（约摄氏204度）。
首先将烘炉加热到375度。
将空盘放入烤箱预热。
Preheat the oven to 350 degrees F.
预热烤箱至350华氏度(约摄氏180度)。
Preheat waffle iron to medium high.
将华夫铁板调至中温预热。
Preheat oven to 275 degrees F (135 degrees C).
将烤箱预热至135摄氏度。
Preheat oven to 360 degrees F (180 degrees C).
烤箱预热到华氏360度（摄氏180度）。
Before soldering, be sure to preheat components.
焊接前零件一定要预热。
Preheat your oven to 500 degrees for at least one hour.
烤箱华氏500度(约为摄氏250度)预热一小时。
Take the tray out and preheat the oven again to 180C.
烤熟后将烤模取出备用，烤箱预热至180C。
Preheat oven to 325 degrees. Line a baking tray with non-stick tin foil.
烤箱预热至325度，烤盘扑上一层锡箔纸。
ZDH series preheater is mainly used to preheat the PCB before impact cutting.
ZDH系列预热机主要用于印制板在冲切前的预热。
A shortened cycle should be used to preheat the system (ie omit the drying phase).
缩短的周期应该用来预热系统(即省略干燥阶段)。
The combustor is of the vaporiser type, and hence is equipped with three preheat burners.
燃烧室是汽化器的类型，因此是有三个预热刻录机。
A solar wall was also erected on the south-west facade of the building to preheat fresh air.
太阳能墙壁也竖立在大楼的西南立面来预热新鲜空气。
Please give the standards of the preheat before welding and those of the heat-treatment after welding.
请您提供焊前预热和焊后预热处理的规范。
Preheat the oven to 400 degrees with the racks positioned in the middle and upper thirds of the interior space.
预热烤箱至400度，将烤架放在中间偏上约三分之一的地方。
When grilling, preheat the coals on your grill for 20 to 30 minutes, or until the coals are lightly coated with ash.
当烧烤时，预热炭煤20到30分钟，或直至煤是轻轻涂有炭灰。
If you must use a PTFE-lined pan, keep your stove's burner on media or lower. Also, never preheat an blank pan.
非要使用PTFE(聚四氟乙烯)内衬的平底锅时，应保证炉头处于中等或更低温度。另外，绝对不要预热空无一物的平底锅。
If you must use a PTFE-lined pan, keep your stove's burner on medium or lower. Also, never preheat an empty pan.
非要使用PTFE(聚四氟乙烯)内衬的平底锅时，应保证炉头处于中等或更低温度。另外，绝对不要预热空无一物的平底锅。
The formulations change required are new activator systems, which can sustain higher preheat and soldering temperatures.
对配方所必须作出的变动即是添加能够承受较高的预热和焊接温度的新活化剂配系。
Ok. By the way, did you preheat the oven already? According to this recipe, you need to preheat the oven to 350 degrees.
好了。对了，你已经预熟烤箱了吗？照这个食谱看来，你必须先把烤箱预熟到华氏350度。
Preheat oven to 350F. Butter and line a 9in x 9in x 2in baking pan, dusting the sides with flour and tapping out any excess.
预热烤箱至350F。准备黄油和一个9*9*2英寸的烤盘，将盘的两侧图上面料，并将多余的去除。
Earlier power, current meter on the control panel display is 8 -10 an an, preheat the machine about 3 minutes, you can work.
在先接通电源，控制面板上的电流表显示为8安- 10安，将机器预热3分钟左右，即可正常工作。
Hence conductor preheater is used to preheat conductors in order to meet the requirements of the process of category cables.
预热器就是用来加热导电线芯，以满足数字电缆的高要求的生产工艺。
Additionally, the fire is able to preheat the fuel further up the hill because the smoke and heat are rising in that direction.
另外，火能预热更高山上的燃料，因为烟和热量顺着那个方向上升的。
Energy can be recovered and returned as process make-up air, used to preheat combustion air, or used for plant or office heating.
可以在空气补偿的过程中对能量进行恢复和退回，用于对燃烧空气的再加热或工厂、办公室的加热。
Energy can be recovered and returned as process make-up air, used to preheat combustion air, or used for plant or office heating.
可以在空气补偿的过程中对能量进行恢复和退回，用于对燃烧空气的再加热或工厂、办公室的加热。
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