This paper studied the application of fly ash on concrete sleeper with the method of ortho design.
本文采用正交设计的方法，对粉煤灰在高强预应力混凝土轨枕中的应用进行了试验研究。
In this paper, the synthetic method of high-ortho resol resin and influence of other chemicals ingredients on the adhesive was discussed.
讨论了高邻位酚醛树脂合成及其它助剂对减震胶性能的影响。
The invention relates to a hair dyeing method starting from a composition comprising at least one ortho-diphenol, one metal salt, hydrogen peroxide, (bi)carbonate and a basifying agent.
本发明涉及由包含至少一种邻-联苯酚、一种金属盐、过氧化氢、碳酸（氢）盐和碱化剂的组合物出发进行染发的方法。
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