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1)  turn up and turn down
正反包
1.
Introduced the new type LG-G25sd building machine for engineering tire consisted of theproperties of the folding drum、band expanding and clamping/drawing off device、main driving system、stitching device、turn up and turn down device、inner and outer bead insert chucks、profile compo-nents servicer and electrical control system.
介绍了新型工程轮胎成型机LC-G25sd的主机折鼓装置、帘布扩导和夹持牵引装置、主传动系统、压辊装置、正反包装置、内外扣圈、型胶供料装置及电气控制系统的特点,论述了其先进性。
2)  opposite-direction lapping
正反向绕包、正反向绞合
3)  positive bags and negative bags
正包和负包
4)  setting wrong things right
反正
5)  Exactly the opposite
正正相反
6)  normal closure
正规闭包
1.
The paper uses the tools about algebraic number theory to find a class of quartic algebraic integer ±p~(1/2)±q~(1/2),then,it is determined and proved that their minimal polynomial is [x2-(p+q)]2-4pq,and in their normal closure,there are four real inserts and no complex inserts.
用代数数论的有关工具,找到了一类Q上四次代数整数±p~(1/2)±q~(1/2),确定并证明了它们的极小多项式是[x2-(p+q)]2-4pq,其正规闭包有4个实嵌入且没有复嵌入。
2.
In this paper,according to the meaning of the normal closure and the operating characteristic of permutation,the generation algorithm of the normal closure of the symmetric group subset is designed,and the corresponding computer program is composed by using C language.
根据正规闭包的意义及置换的运算特征,设计出对称群子集的正规闭包的生成算法,并且用C语言编写出相应的计算机程序。
补充资料:外护圈包布、钢圈包布
分子式:
CAS号:

性质:又称外护圈包布、钢圈包布。指包在钢丝圈和三角胶条外面的胶布。当胎圈中只有一个钢丝圈、并且没有三角胶芯时,可以不用此包布。其作用是使钢丝圈和三角胶芯组成一个整体,防止在成型和放置过程中发生位移,便于成型操作。

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