全部评论(2条)
-
- 啊160002 2009-12-11 00:00:00
- 楼上给的标准正是我要找的,谢谢啦!
-
赞(17)
回复(0)
-
- uijghnhg 2009-12-07 00:00:00
- 朋友 你找的标准号有误! 标准编号:JB/T 7484-2007 标准名称:铝(Al)反射镜镀制工艺 标准状态:现行 英文标题:Coating techniques for Aluminious reflector 替代情况:替代JB/T 7484-1994 实施日期:2007-11-1 颁布部门:中华人民共和国国家发展和改革委员会 内容简介:本标准规定了光学零件真空镀铝的工艺流程、镀膜质量及主要参数控制。本标准适用于可见、此外与近红外光谱区使用的光学零件真空镀铝反射镜,加介质保护膜的外反射镜与加保护漆的内反射镜,以及加镀多层介质膜层的金属-介质高反射镜。
-
赞(9)
回复(0)
热门问答
- 急求JB/T7484.2-2007标准,请发87587864@qq.com
2009-12-06 23:17:38
590
2
- 求发GB 3836.1~15-2000全套标准
2018-11-18 14:22:55
273
0
- 急求EIA 364标准 中文版
2018-11-10 12:56:01
278
0
- 急求聚丙烯红外光谱标准图
- 急需聚丙烯标准红外光谱图,谢谢
2012-07-06 17:27:11
405
1
- 求镀锌件盐雾试验标准,急,谢谢
- 盐雾等级达到为48H,NNS试验后10/6SA级以上,想知道详细一点... 盐雾等级达到为48H,NNS试验后10/6SA级以上,想知道详细一点 展开
2017-11-21 05:45:53
725
1
- 求 均速管流量传感器 JB/T5325-1991,多谢。
2010-11-17 16:10:14
253
1
- 求文档: JB/T5520-91 《干燥箱技术条件>
- 谢谢!
2015-06-25 23:05:42
317
1
- 急求CAD标准图标(水电、化工),谢谢!!
- 因论文需制作生物滴滤池流程简图一张,无奈所学专业与此相差甚远…… 就是要些CAD中能代表“阀门、蠕动泵、流量计、桶……”等等的小图标, 图集请给出链接,或发到我邮箱“sundfwolf@yahoo.com.cn”,谢谢!! 若图集丰富即追加积分,谢谢!!
2009-08-28 12:31:06
229
4
- 请高手解答哪有便携式重金属测定仪?急求
2014-04-10 22:44:55
310
1
- 请问小麦种子如何发苗,做DNA提取用,急求!!!!!
2011-07-22 02:47:10
420
2
- 急求实验台尺寸标准的国标名称GBXXXXX
2012-01-12 04:04:51
360
3
- 请问谁有ISTA的测试标准,请发一份给我吧,邮箱:sobreath@yahoo.com.cn
- 请问灯具的模拟运输测试中,频率设置应该是多少?或者对应的转速设置是多少?谁有这部分资料请帮忙发一下,感谢。... 请问灯具的模拟运输测试中,频率设置应该是多少?或者对应的转速设置是多少?谁有这部分资料请帮忙发一下,感谢。 展开
2010-11-23 01:33:09
650
2
- 急求翻译 请帮忙翻译一下这篇英文资料,急用!!!!
- Wells-BrookfieldCone/PlateRapidDeterminationOfAbsoluteViscosityIntroductionTheWells-BrookfieldCone/PlateViscometergivesresearchersasophisticatedinstrumentforroutinelydete... Wells-Brookfield Cone/Plate Rapid Determination Of Absolute Viscosity Introduction The Wells-Brookfield Cone/Plate Viscometer gives researchers a sophisticated instrument for routinely determining absolute viscosity of fluids in small sample volumes. Its cone and plate geometry provides the precision necessary for development of complete rheological data. Principle of Operation The Wells-Brookfield Cone/Plate Viscometer is a precise torque meter which is driven at discrete rotational speeds. The torque measuring system, which consists of a calibrated beryllium-copper spring connecting the drive mechanism to a rotating cone, senses the resistance to rotation caused by the presence of sample fluid between the cone and a stationary flat plate. The resistance to the rotation of the cone produces a torque that is proportional to the shear stress in the fluid. The amount of torque is indicated either on a dial or digital display, depending on model. This reading is easily converted to absolute centipoise units (mPa.s) from pre-calculated range charts. Alternatively, viscosity can be calculated from the known geometric constants of the cone, the rate of rotation, and the stress related torque. See Range Tables The correct relative position of cone and plate is obtained by following a simple mechanical procedure without the need for external gauges or supplementary instrumentation. The stationary plate forms the bottom of a sample cup which can be removed, filled with .5 ml to 2.0 ml of sample fluid (depending on cone in use), and remounted without disturbing the calibration. The sample cup is jacketed and has tube fittings for connection to a constant temperature circulating bath. The system is accurate to within ?.0% of the working range. Reproducibility is to within ?.2%. Working temperature range is from 0oC to 100oC. 展开
2018-11-17 09:10:28
437
0
- 求组USM35超声波探伤仪怎么使用?需要详细,资料请发zqfnqlj@163.com
2018-12-05 10:32:26
378
0
- 求环境工程中气体腐蚀试验方面的标准,谁有请发一下谢谢。
2018-12-05 14:02:02
457
0
- 急求ppt器
- 重要会议作报告,严格控制10分钟以内。求器PPT模版或者FLASH,永至灯片首段。
2018-12-06 08:22:18
388
0
12月突出贡献榜
推荐主页
最新话题
-
- #八一建军节——科技铸盾,仪器护航#
- 如何选择到合适的磷青铜绞线?磷青铜绞线的质量...如何选择到合适的磷青铜绞线?磷青铜绞线的质量解析和如何选择到合适的绞线?磷青铜绞线是一种特殊的铜合金导线,由铜、锡和磷等元素组成,具有很好的机械性能、电气性能和耐腐蚀性。磷青铜绞线基本定义与特性:磷青铜是铜与锡、磷的合金,质地坚硬,可制弹簧。典型成分为铜(90%)、锡(6-9%)及磷(0.03-0.6%)锡元素提升合金的强度和耐腐蚀性,磷则细化晶粒、增强耐磨性铸造性能。耐磨性:表面氧化层使其在特殊环境下耐腐蚀,使用寿命长导电性:保持铜很好导电性能的同时有化电子传输路径非铁磁性:不含铁元素,避免在强磁场环境中产生额外能量损耗弹性:受到外力作用时能迅速恢复原状
- 八一建军节 铁血铸军魂













参与评论
登录后参与评论