在选定的试验条件下，甲缩醛收率可达89%以上，塔顶甲缩醛的质量分数可达0.99以上。结果表明，该工艺用于制备甲缩醛是可行的。
The experimental results show that the conversion and the purity of methylal in the distillate can reach 0.89 and 0.99, respectively, and the slurry catalytic distillation process is practic…
利用这次机会收集情况，用你选定的汽车做一次简短的驾驶试验。
Use this opportunity to gather information and take your spec vehicle for a short test drive.
试验结果表明，采用选定的漂白方法，既保证了产品的质量，又可达到降低成本，提高经济效益的目的。
The results showed that the bleach method chosed could not only ensure the quality of products, but also reduce the cost of production and improve economic benefit.
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