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- This paper introduces a microcomputer in a coal mine methane concentrations exceeding the detection alarm device design and debugging methods. 介绍了一种采用单片机的煤矿甲烷浓度超标检测报警装置的设计与调试方法。
- Methane concentrations have more than doubled over the past 100 years, which could explain part of the changes in the high-flying clouds over the past decades. 在过去的100年里,空气中甲烷的浓度增加了两倍以上;而这可以从某个方面解释过去几十年来对高空浮云的疑惑。
- Also in agreement with prior cycles, the methane concentration then declined by 100 ppb as summer sunshine subsequently waned. 与之前的循环波动一样,当接下来夏季阳光减弱时,甲烷浓度下降了100ppb。
- In short, the methane concentration rose when it should have fallen, and it ended up 250 ppb higher than the equivalent point in earlier cycles. 简言之,甲烷浓度在应该下降时反而上升了,而且比过去周期相对应的浓度高了250ppb。
- Early in previous interglacial intervals, the methane concentration typically reached a peak of almost 700 parts per billion (ppb) as precession brought summer radiation to a maximum. 先前的间冰期早期,夏季辐射由于岁差而达到最大值时,通常甲烷浓度也到达高峰,约700ppb(ppb为十亿分之一)。
- methane concentration monitoring 瓦斯检测
- Effect of Methane Concentration on Diamond Film Texture 甲烷浓度对金刚石薄膜织构的影响
- optical interrupter for detection of methane concentration 光干涉甲烷检定器
- methane concentrations 甲烷浓度
- Some of the concentrations are negligibly small. 某些浓度小到可以忽略不计。
- Methane may have extraterrestrial significance. 甲烷具有星际意义。
- Methane is said to be hydrophobic. 甲烷被称为疏水的。
- Freckles are simply concentrations of melanin. 雀斑不过是高浓度的黑色素。
- They were able to nitrate methane to nitromethane. 他们能将甲烷硝化成硝基甲烷。
- The rest is mostly methane and ammonia. 其余的几乎都是甲烷和氨。
- Selective Study on Adsorbent for Improving Coal-bed Methane Concentration 提高煤层气甲烷浓度的吸附剂的选择研究
- RHS concentrations vary from 10~(-12) to 10~(-10). RHS的浓度有较大的变化范围(10-12~10-10)。
- The test results show that a rare-earth concentr... 同时,对试验流程的改进和优化提出了建议。
- Must be some kind of methane buildup. 应该是沼气集聚起来了.
- Analysis on relationship between ventilation pressure and methane concentration 通风压力与瓦斯关系分析