一种检测调校光电控制器的可变照明装置包括：在箱体光室中一端的光度可调的白炽灯泡。在光室中靠近灯泡的、使灯泡发出的光多次反射的光障。在光室中另一端的让该多次反射后的光线射出光学室的透明窗口。在光室中窗口附近的具有窗口相同光度的测光表。在光室外的围绕该窗口的遮光圈。与测光表连接的在箱体电器室中可由外部读数的显示器。在电器室中向灯泡供电的电池组。在电器室中可由外部调节的控制该电池组供电电流大小的变流器。在电器室中的可由外部调节测光表的调节器。本实用新型装置结构简单，造价低廉，体积小巧，可用于不同尺寸的光电控制器感光窗，使得街灯用的光电控制器在任何强度的环境光下都能检测调校。
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The invention provides a fluid buffer with adjustable damping coefficient, it includes: cylinder tank which has a placing space, the placing space is filled with fluid; piston which is equipped with piston head moving in the placing space and the piston bar extending from the piston head to two ends.....
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The invention discloses a gas burner for controlling mixing, comprising a burner body. The rear end surface of the burner body is provided with a mixed gas nozzle and a secondary air nozzle, and a gas channel and a primary air channel which are both communicated with the mixed gas nozzle are arrange.....
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An ultrasonic transducer driver has a giant magnetostrictive element, a fastener for holding the giant magnetostrictive element under mechanical pressure, a first field generator for providing a magnetic bias field, a second field generator for providing a magnetic drive field and a magnetic circuit.....
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The present invention relates to a pyridine carboxylic acid as a ligand for Oxo acid, acetic anhydride positive ions bimetallic catalysts. The catalyst is pyridine carboxylic acid ion activity center with Rh (I) the formation of chelate-type square planar cis-dicarbonyl ligand structure, pyridine ca.....
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