飞环式危急保安器与飞锤式危急保安器结构上有什么不同?

我英语能耐一般,不过希望对你有用!
This article from the small tooth number difference planetary gear drive theory, introduces the development history of ring reducer, which also introduced some scholars on the ring reducer research. This paper focuses on tricyclic and double ring gear reducer transmission principle, body types, as well as on their way to overcome dead point position, compares the similarities and differences.This paper focuses on the research of Double-ring Gear reducer, using PRO / E software on the double ring gear reducer were accurate 3D modeling, and all the parts are assembled into a whole. In order to verify the gear parameter selection is reasonable, the assembly end of the double ring gear reducer for interference checking, and the movement simulation animation, more clearly see the motion characteristics of Double-ring Gear reducer. Based on the double-loop reducer of stress analysis, found that the research object of this paper has some shortcomings, the research object of this paper is to put forward to modify an opinion, and on the modified structure of the theory of stress analysis, the stress variation.

所谓伯醇就是羟基连接在碳链一端的醇,也称第一醇.例如乙醇CH3-CH2-OH,伯醇具有-CH2OH的结构.伯醇羟基就是指伯醇的羟基.
环式葡萄糖中半缩醛羟基最活泼,伯醇羟基最不活泼.

异形胞只有光合系统Ⅰ,能进行光合磷酸化产生ATP,并且没有氧气的释放.

刚学过,可惜记不清了.
植物体内的生化反应不是单独进行的,你要考虑到其他反应比如胞质、线粒体等细胞器中的反应,它们可以提供NAD+等还原力.

In order to understand the mechanical performance and related tectonic design requirements of the concrete-filled steel tube's nodes with special-shaped cross-section , in this experiment we need to make three test models,which's concrete filled steel tube column - the reinforcement ring type node in T-shaped section , and make the low weeks reciprocating load tests. By changing the axial compression ratio of the columns and increasing the width and overhanging length of (ring board), we can study the hysteretic performance of nodes which's under reciprocating cycle load , and then discuss the working mechanism of such node. The results show that by increasing the width and overhanging length of (ring board),the hysteretic performance, ductility and energy dissipation capacity of nodes are obviously improved.
自己翻译的 可能部分专业词汇并不准确 比如那个环板我就翻不来 打了括号.专业英语白学了啊.

不是,同系物有个规律就是它们的化学式只会相差一个或几个CH2,链烃和环烃显然不符合
学到后面应该就明白了

画我 就不画了 给你说说原理 很容易画的.
环烃的取代物在命名的时候,选择Z/E还是选择R/S,要看环是否有对称性.
如果环有对称性,（S1或者S2）,我们就用Z/E命名,如果没有就用R/S命名.
你写的物质不就是2个羧基么,如果两个羧基在环的一侧,那么就是Z式的,
如果两个羧基在环的异侧,就是1R,2R和1S,2S两种.

AB全错
A：如果成环,首尾游离的氨基和羧基也会脱水缩合,形成第23个肽键
B：有U的只会是RNA,只有3种

70%的气体在常温下面是液态?请问这里提的是常压吗?
如果你能保证70%的气体在进真空泵之前都能冷凝成液态后回收掉,且对刚开始的抽真空时间没有限制.定义常温常压下的气量为：30摄氏度,1atm,50*30%立方每小时；
用P1V1/T1=P2V2/T2计算；
V2=75立方每小时；真空泵选择看性能曲线：满足在20000Pa.A的气量是300立方每小时.
（以上只是理论上面的数字,你还要考虑反应器在真空状态下的气体蒸发量是否会变大,70%的气量冷凝成的液体在真空状态下面的挥发量,管道管阻、压力损失等等）

π*D*0.02*200000000=60000
D=60000/1256360=0.00477米
直径4.77毫米
题目有问题：
公称力350kN内的可倾式压力机未见有设置压环式保险器的.
该题目中的压环式保险器就没法用.
莫非把公称力600kN抄成了60kN?

你好,
环状结构的比例较高.这是因为环状结构是半缩醛,半缩醛结构较羟醛结构稳定,而且六元环是很稳定的（一些氢键六元环会比其他形式稳定,比如2,4-戊二酮）.
希望对你有所帮助!
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由于神经元形成环状连接,一旦其中一个神经元兴奋,则其他神经元会依次兴奋,然后导致这个神经元的再次兴奋,这样的兴奋会因为环状连接而持续一段时间,直到递质消耗得差不多为止,因此比一般的结构兴奋的时间更长,从而达到持续兴奋的后放效果.

井水当然是地下水,这个项目就是一抽一回了,由于井水由于夏季温度比江水低,冬季比江水高,因此地下水地源热泵采用的是满液式机组,水源侧能够大温差（8-10℃）运行,可以有效降低井水来量,降低井数、减少水源侧水泵功率、减少造价.而一般的江河水一般用普通的干式机组,只能标准温差（5℃）或更低温差运行了,且冬天水温低时,部分地区可能达到0-5℃,机组运行困难,需要加辅助供热设备.（地下水如果回灌做不好还是别做了吧）