The active component is suitably provided in the form of microparticles or microcapsules having an average diameter of less than 125 microns.
有效成分适合地以平均直径小于125微米的微粒或微囊形式提供。
The nano double-metal catalyst prepared by the preparation method has the advantages of uniform granularity of active ingredient grains, small grain diameter range and high catalytic activity.
其制备方法制备的纳米双金属催化剂具有活性组分粒子粒度均匀，粒径分布窄，催化活性高的优点。
The main work and production of the paper are as follows, (1) Long diameter saturated steam pipes belong to active thermodynamic objects.
论文完成的主要工作及取得的成果如下： （1）大直径饱和蒸汽管道属于有源热工部件。
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