1)  micro span,midspan
跨距中点
2)  span
跨距
1.
Arch pipe is a long-span structure made with bending and welding steel tube which is characterized by no requirement of the arch hinges.
从分析计算表明,跨距在30~90米之间,应优先采用拱管跨越方式。
2.
When the customer as well as the manufacturers selects the ADSS types, besides considering the fiber numbers of ADSS, sometimes they define ADSS type based on span.
目前,无论是用户还是生产厂家,在ADSS光缆选型时,除了提出光缆的光纤芯数之外,往往以“跨距”来定义ADSS光缆。
3.
The influences of span on the motion stability of chains were discussed, and the relationship among chain sags, chain lengthes and chain numbers was studied, and the reasons for tooth-leap were analyzed, and a new-style device preventing tooth-leap was provided.
对垃圾集装箱装卸机构进行了创新设计和开发,提出了垃圾集装箱链条式装卸机构,分析了链传动跨距对机构稳定性的影响,研究了铅垂布置的链传动垂度、链条伸长量和链节数之间的相互关系,分析了跳齿现象发生的原因,提出了一种新型防跳齿装置。
3)  bearing stride
支承跨距
1.
This paper presents a new structural scheme of Meso-scale lathe spindle system, and introduces a numerical computational method for spindle's bearing stride in machine tool.
并以此为例,对主轴部件的结构参数进行了计算,重点介绍了一种机床新主轴支承跨距理论值的数值计算方法。
4)  3D Stepover
3D跨距
1.
3D Stepover and Its Application of Milling Manufacturing Process Based on UG;
基于UG铣加工过程的3D跨距及其应用
5)  Anvil span
砧座跨距
6)  limited span
极限跨距
1.
Put forward coal roadway pit board fracture structure separated layer hinged arch limited span theory,on the basis of the limited span theory,pointed out and provided stability basis for coal roadway pit board fracture structure separated layer hinged arch in roadway and proof the limited span theory application volume by the actutal examples.
提出了煤巷板裂结构顶板分层绞接拱极限跨距理论，通过对这类结构顶板的极限跨距理论分析，指出了煤巷板裂结构顶板分层绞接拱的稳定性判据，并通过一具体实例说明其理论和应用价值。
2.
The roof in working areas is simplified as rock beam,the maximum tensile stress and limited span of rock beam are important in mining engineering.
将采场顶板简化为岩梁模型,岩梁的最大拉应力及其极限跨距是采矿工程涉及到的两个重要参数。
参考词条
补充资料：升降中点法
分子式：
CAS号：

性质：在用渗透压法测定聚合物数均分子量时，测定渗透高度的一种方法。即将渗透压计中的液面高度提高到距渗透平面值以上△h处，在渗透平衡过程中，液面下降，可测得液面高度随时间增加的下降曲线；再将液面调节到平面值以下△h处，在渗透平衡过程中，液面上升，测得液面随时间增加的上升曲线。将上升、下降两曲线上同一时间的点连起来求出中点，这些中点连线所示的液面高差即为渗透平衡时的渗透高度，这种测定渗透高的方法即为升降中点法。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。