upper span 中文意思是什麼
upper span
解釋
上翼展-
We expect stars with short life span are already dead. when we plot the stars of a cluster in the h - r diagram, we see the more massive stars, which are stars in the upper left, have already evolved off the main sequence
換句話說，星團內壽命短的星應該已經死去，當我們把星團內的星以赫羅圖的形式繪畫出來時，我們發覺位於圖中左上角的大質量恆星果然已經步入死亡階段，離開了主序星的行列。 -
The wear - out of the edges of upper & lower punches as well as the liners would be decreased and the life span of the mould be lengthened because of the positioning of upper punch and enlargement of exhaust passage
由於上沖頭的定位和下排氣通道的增大，減小了上下模芯刃口的側板的磨損，延長了模具的使用周期。 -
The upper bound of life span for the solution was obtained
得到了解的爆破時間跨度的上界。 -
To each of liquid and solid, the most of way is perpendicular installation, make the medium from lower to upper, it will be made attrition uniform in the transmitter, prolong using life - span
對于液固兩相流體，最好採用垂直安裝，使被測介質自下而上流動，可使變送器襯里磨損均勻，延長使用壽命 -
Construction of flat tunnel of large span at extra - shallow depth must be conducted on the principle that advance grouting should be strictly performed before excavation and length of pull at one time should be short, together with reinforced support, immediate closing and constant monitoring and surveying. that preceding pilot tunnels, large - volume excavation divided into small ones, excavation of flank before that of center, upper before lower, arch before wall etc is a good method which could effectively reduce surface subsidence and its adverse effect on adjacent buildings, in addition, some other measures are also taken to lessen blast - induced vibration in the ground and surrounding structures. in a word, all means and steps mentioned above have already proved effective and practicable in practice
軟弱大跨超淺埋扁平隧道必須按「管超前，嚴注漿，多分部、短開挖、強支護、快封閉，勤量測」的施工原則進行施工，採用「眼鏡超前，化大為小，先側后中，先上後下，先拱后墻」的施工方法控制地表沉降和對周邊建築物的影響；採用「多分部，化大為小，短進尺，密布眼，弱裝藥，設減振槽」 ，控制爆破振動，經過實踐證明，這些方法都是行之有效的。 -
And this text system have power breakdown protect function, all parameters setting by the upper computer and the state of do passway can be protected when they are in the state of power breakdown. the life - span of the battery is 10 years
而且本文系統有掉電保護功能，各種通過上位機設置的參數及do通道狀態均可掉電保持，電池的壽命為10年。
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