The Shanghai Composite Index dropped by 6.7% on August 31st after falling 3% on the previous trading day (it made up some of the loss later in the week).
上证综合指数继前一交易日中3%的下跌之后在8月31日再次下跌6.7%(这时后半周亏损的原因之一)。
The pure polymer gel has low mechanical strength, but the new multi-function composite gel has high mechanical strength, which can control the down-hole loss circulation effectively.
纯粹的聚合物凝胶力学强度相对较低,而新型多功能复合凝胶的力学强度相对较高,能有效的解决井下地层漏失。
Numerical analysis of the composite bending stiffnesses and the loss factors of the different interlayer damping structures have been carried out.
研究表明,增加多夹层组合结构的夹层层数对组合结构损耗因子的提高量有限;
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