The fatty acid methyl esters was prepared from Acer Truncatum buge oil, and the main influence factors of separating nervonic acid methyl ester by urea-inclusion method were analysed.
将元宝枫油制成混合脂肪酸甲酯，再应用尿素包合法对其中的神经酸甲酯分离的主要影响因素进行了正交试验研究。
By using this process to repair castings, there is no obvious separating line, no slag inclusion and gas hole between the welding zone and base metal.
用此工艺焊补铸件，焊补区域与基体间没有明显的熔合线，无渣孔、气孔等缺陷。
By using this process to repair castings, there is no obvious separating line, no slag inclusion and gas hole between the welding zone and base metal.
用此工艺焊补铸件，焊补区域与基体间没有明显的熔合线，无渣孔、气孔等缺陷。
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