Disclosed is an extendible emergency bump guard post arranged underground comprising a base with open top, a post placed in the base not in use and in vertical place in use and a protecting hood movably connected with one end of the base, wherein when the post is located in the vertical or horizonta.....
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The invention discloses a catalytic asymmetric hydrogenation reaction. Of the present invention is the role of chiral catalyst, H2 of the prochiral unsaturated compounds to addition reaction to obtain the chiral product, wherein the solvent used in the reaction liquid polyethylene glycol compound. T.....
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公开了一种腕骨骨折复位和固定装置，其包括：贴靠着使用者的前臂掌侧的前臂掌侧板（２）；连接于所述前臂掌侧板（２）的内侧向板（３）和外侧向板（３’），所述内、外侧向板（３、３’）通过至少一根带状部件（６）分别靠近前臂的内、外侧定位；利用另外的至少一根带状部件（６’）贴靠着使用者手背的手背板（４）；其中，所述内、外侧向板（３、３’）各自通过万向连接装置（５）连接到手背板（４）上，所述万向连接装置（５）允许使用者的腕部沿着任意方向运动，并可以在任意角度固定。
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For the treatment of fabric or fibers suspended in distilled water solution from 0.1 to 10% of the natural fiber material. Fabric or fibers wetted with the solution 1 to 60 minutes. After wetting the fabric or fibers at a temperature of 80 ~ 160 ℃ dried for 1 to 10 minutes.
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本发明涉及一种煤粉喷嘴装置，连接煤粉混合气体输入装置和炉膛，包括主体，主体内设有一次风喷嘴、二次风喷嘴、三次风喷嘴和中央混合气室，一次风喷嘴、二次风喷嘴和三次风喷嘴并行设置；一次风喷嘴与中央混合气室连通，以煤粉、空气和煤粉燃烧产生的烟气为主要成分的主气流从一次风喷嘴和中央混合气室进入炉膛；二次风喷嘴与一次风喷嘴连通，以空气或/和助燃剂为主要成分的二次气流从二次风喷嘴和一次风喷嘴的主气流会合再经过中央混合气室进入炉膛；以空气和煤粉燃烧产生的烟气为主要成分的三次气流从三次风喷嘴进入炉膛；本发明的煤粉喷嘴装置通过调整主气流、二次气流和三次气流的大小和成分比例来调整火焰大小，并使煤粉达到最高燃烧率。
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