For large work pieces preheating is recommended.

用于大焊件时建议预热。

Batch and cullet preheating systems: using furnace waste gases.

配料和碎玻璃预热系统：采用窑炉废气热能。

Need not preheating, turn a few minutes to reach set temperature.

不需预热，开机几分钟内即可达到设定温度。

Preheating is required if either of these two conditions are not met.

如无法满足两个条件中任意一条，则需要进行预热处理。

Condensate from the first-effect calandria is used for preheating the feed.

一效列管换热器中出来的冷凝液被用来预热进料。

The processes of preheating and welding of super scale penstocks were detailed.

本文详细叙述了巨型压力钢管的预热装配和焊接过程。

Preheating temperature shall be kept uniform from the start to the end of welding.

预热温度在焊接开始到结束期间应保持均衡。

Preheating process is very important because it affects machining quality directly.

预热效果直接对加工质量产生很大的影响。

Proper selection of materials, preheating and postheating can help to avoid cracking.

适当的选材与低温预热及后热可以抑制表面裂纹的产生。

The key of the technology was designing ideal process by using suitable preheating method.

该技术的关键是采用合理的预热方式，设计出理想的工艺流程。

The dual self-preheating burner and pulse burn control technology are emphatically introduced.

对复合自身预热烧嘴、脉冲燃烧控制技术进行了重点介绍。

Every morning clean, beat butter, then preheating machine, in addition to have no chance to touch device.

每天早晨起来擦车，打黄油，然后预热机子，除此都没有机会摸设备。

High Temperature Hardening, Metal Melting, Annealing, Stress Relieving, Preheating, Special Applications, Tempering.

高温淬火，金属熔化，退火，压力缓解，预热，特殊应用，回火。

The atrium hall also functions as a natural preheating of fresh air, thus contributing to over all energy efficiency.

中庭大厅也有一种预热天然的新鲜空气的功能，从而提高了所有的能源效率。

The welding technology used for preheating flash butt welding was evaluated for workpieces with large welding section.

针对大截面工件的闪光对焊工艺特点，确定了预热闪光焊的焊接工艺。

A set of absorption heat pump is designed to recycle these heat for preheating brine and reduce the steam consumption.

本文的目的是设计一套吸收式热泵回收这部分热量，用来预热盐水，达到降低蒸汽消耗的目的。

In addition, the use of U3751 battery in operation, only five minutes of preheating, suitable for outdoor and field test.

㩿另外，U 3751在操作时使用电池，只需五分钟预热，适用于户外和场地测试。

The measured temperatures basically agree with the simulation results, which validates the feasibility of preheating optimization.

试验测得的温度与模拟结果基本一致，验证了预热优化设计的可行性。

The stress distribution of cladding layer can be ameliorate with preheating before cladding and thermal retardation after cladding.

熔覆件整体的熔前预热和熔后保温，可以改善熔覆层的应力分布。

The essential procedures consist of alloy melting, preheating pre crystalizer, melt stirring and oscillation, solidification and drawing.

其基本过程包括合金熔炼、预结晶器预热、熔体搅拌和振动、凝固拉坯等基本环节。

No preheating is required for P8 material in general. For the correct preheating and interpass temperatures, please refer to corresponding WPS.

对于P 8材料，一般不需要预热，关于正确的预热和层间温度的要求，参见相应的WPS。

Asphalt paint coating is used to transport gas pipeline. Preheating before painting can improve the adhesion of asphalt paint, accelerate drying.

沥青漆涂层是用于输送燃气的管道。喷漆前对管子进行预热可以提高沥青漆的附着力，加速干燥。

The simulated results showed that by preheating the inlet air, natural gas can realize the self-ignite in the separated chamber and burn quickly.

模拟计算结果表明，在采取进气预热措施后，天然气在分隔室燃烧室中可以可靠着火，并能迅速燃烧。

The preheating method includes heat-pipe exchanger, tubular heat exchanger, plate heat exchanger, heat medium exchanger and regenerative hot stove.

预热法包括用热管换热器、管式换热器、板式换热器、热媒式换热器和蓄热式热风炉。

The effect of preheating intensity on engine performance has analysed, and the parameters for evaluating preheating intensity are suggested as well.

分析了进气预热强度对发动机性能的影响，并提出了进气预热强度的评价指标。

After the process of blanching, grinding, preheating and spray-drying, the soybean milk powder thus prepared tasted palatable and had no off-flavor.

在经过对大豆的浸泡、热烫、磨浆、煮浆和喷雾干燥等工艺过程之后，实验制备的豆奶粉口味纯正，无不良风味。