Abstract : This test is amid at the general existent problems of the water-repellent admixture use in pump concrete ,the powdery and high accretion admixture with many shortcomings ,without automatic measure ,with high working-intension ,with polluted environment and so on. We mixed many water-repellent elements for concrete according as the theory of reduce water ,adhibit gas ,reduce shrinkage , adding hydrophobe and so on. According the research ,we produce a multiple liquid water-repellent admixture for pump concrete with good performance and low accretion(under 215 %) .
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The test was designed to measure the subjects' automatic processing of Numbers and was rolled out to both people with the dysfunction and those without it.
这项测试设计用来考察受试者对数字的自动处理能力，可同时用于有计算障碍的人和正常人。
The internal automatic range digital multi meter directly measure 11 kinds of different functions, without the need of expensive external signal adjustment.
内部的自动量程数字多用表直接测量11种不同功能，而无需昂贵的外部信号调整。
In field of displacement measure without touch, charge couple device CCD is a high sensitivity photoelectric sensor with high measurement precision, which can be used in automatic succession measure.
在非接触位移测量领域中，电荷耦合器件CCD是具有较高灵敏度的光电传感器，其测量精度高，能自动连续地进行检测。
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