黄铜氧化着色因其膜层色彩丰富、光泽好而广泛应用于服装配件、建筑装璜、灯具、五金制件等方面。本文对该工艺作了仔细研究,确定了具体的工艺流程并介绍了四种化学氧化... 刘刚,乐露 - 《电镀与环保》 被引量: 0发表: 1991年 好茶须配美器 话说17世纪后半段,路易十四把他的巴洛克爱好发挥到登峰造 极,简单来说...
Traditionally, disability was not regarded as a human rights issue. As recently as 19 years ago, it was not so broadly acknowledged. Although there had been prior cases decided in the United States and in Europe that, retrospectively, had been litigated from a human rights perspective, the cha...
摘要: Sonatrach has been given the thumbs up for a development that will involve hundreds of wells in the multi billion barrel Hassi Messaoud acreage.年份: 2005 收藏 引用 批量引用 报错 分享 全部来源 求助全文 国家科技图书文献中心 (权威机构) 掌桥科研 相似文献...
李秀领在全省农村人居环境工作会议上强调:改善农村人居环境 建设美丽宜居乡村 5月30日,云南省农村人居环境工作会议在昆明召开。省委副书记李秀领出席会议并讲话。李秀领指出,要深入学习贯彻习近平总书记关于乡村振兴和改善农村人居环境的重要指示... - 《创造》 被引量: 0发表: 2018年...
空气中可吸入细颗粒物(PM2.5)暴露是严重的公共卫生问题,机体暴露于PM2.5可引起多种健康损伤,尤其是肺毒性作用。本文针对近年来PM2.5暴露所致机体的肺毒性效应及机制,... 杨洁,邓建军,刘靳波,... - 《环境与职业医学》 被引量: 2发表: 2016年 大气颗粒物PM对大鼠呼吸系统免疫损伤机制研究 许多研究表明呼吸系统疾...
Apparatus for raising and lowering a blind wound on a rotatable cylinder comprises a winding roller (7) selectively driven through reduction gearing (13-16) by a reversible electric motor (11), a strap (9) wound on the roller (7) and extending to the cylinder to cause rotation of the ...
1417556 Valves BRYAN DONKIN CO Ltd 6 March 1973 [13 March 1972] 11636/72 Heading F2V The closure member 16 of a safety cut-off valve for a gas supply system is held open against the force of a spring (not shown) by a detent system comprising a latch 22 and a lever 19 attached to...