For the purpose of analyzing and calculating the switching torque of the high-pressure gate valve accurately,the structure principle analysis and force analysis are carried out by taking non-rising stem gate valve as an example to find out the condition under which the switching torque reaches the maximum.
为了准确地分析计算高压闸阀的开关扭矩,笔者以暗杆式闸阀为例对其进行了结构原理分析、受力分析,找出开关扭矩出现最大值的状态,并运用新的计算公式进行了计算检验。
Non-rising-inside screw stems are used in bronze and iron gate valves.
暗杆－内螺纹结构用于青铜和铸铁闸阀。
The Fig. 1710 Balancing valve is a non-rising stem design incorporating a parabolic (plug) shaped disc.
型号1710平衡阀为暗杆结构，配置抛物线(塞)形阀瓣。
The square operating nut can be substituted for the reqular handwheel when an N.R.S. valve is to be installed in an inaccessible location.
如果阀门暗杆安装在难于接近的地方,则四角操作螺母能够替代普通手轮。
Application of Mentality Suggestion in Pole Volt training process;
撑杆跳高训练过程中心理暗示的应用
Application of psychological suggestion in pole vault;
心理暗示在撑杆跳高训练过程中的应用
Mechanism Research on System Rockbolts of Shallow-Buried Undercut Loess Subway Tunnel
浅埋暗挖地铁黄土隧道系统锚杆作用机理研究
Product Description: A bunch of celery consists of long pale green stalks with dark, broad green leaves. Eat raw with dips and salads, or cooked in soups and stir fries.
中文描述：旱芹有发白的绿杆，暗绿色的菜叶。可和色拉一起生吃，也可做汤，或用来拌油炸食物。
They walked down the road to the old man's shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats.
他们顺着大路朝老人的窝棚走去，一路上，黑暗中有些光着脚的男人在走动，扛着他们船上的桅杆。
She went up the steps, caressing the broken white banisters, and pushed open the front door.
她走上台阶，一路抚摩着那些损坏的白栏杆，然后推开前门，大厅阴暗而寒冷，像个地下墓穴似的。
Finally, at even lower levels such as moonlight which is much lower than average streetlighting, the cones cease to function altogether.
最后，对于一个比通常街道照明还暗的月光区域，杆状细胞停止（锥状细胞）起工作。
make dark, dim, or gloomy.
使变得黑暗淡或黑暗。
I have scoffed them in my heart.
我心里暗暗嗤笑他们。
Somber or dark in hue.
颜色灰暗的，昏暗的
A period of darkness and gloom.
一段黑暗阴暗的时间
For a moment, he is thinking.
他暗暗合计了一下。
He laughed in his sleeve at the words.
听了这话，他暗暗好笑．
light and shade contrast
明暗反衬，明暗对照
nuts of an anchor
有杆锚杆孔上下的杆箍
