Hexagon socket set screws with flat point iso 4026 : 2003 ; german version en iso 4026 : 2003 内六角平端紧定螺钉
Plain washers , chamfered - normal series , product grade a iso 7090 : 2000 ; german version en iso 7090 : 2000 倒角平垫圈.标准系列.产品等级a
Road vehicles - m12 x 1 , 25 spark - plugs with flat seating and 14 mm bi - hexagon and their cylinder head housing 道路车辆.带14mm十二角平座及其气缸盖的m12x1 , 25火花塞
A set of microemulsions of water / span80 / transformer oil with different water content are prepared and their optical activity are measured with the changes of applied electric field and , the angle between the electric vector of the incident linearly polarized light and the external electric field , using an automatic polarimeter 对于某一浓度的微乳液，在外电场的作用下，旋光角平随0变化且先增大后减小。实验测得微乳液的电致旋光效应为正，即外电场作用下，微乳液样品为右旋物质。
Several kinds of er fluids with different concentration are prepared and their optical activity are measured with the changes of applied electric field and using a automatic polarimeter . experiments indicate that when none of the external electric field e , concentration c and 9 are equal to zero , er fluids appear optical activity . for a given concentration , optical rotation angle increases with electric field and concentration 实验发现:无外电场作用时，微乳液没有旋光效应;当e > o且浓度c和0均不为零时，出现旋光效应且旋光角大小随电场增加而增加;存在一个饱和电场值es ，当大于es时，旋光角平趋于一定值。
