... Frequency control in lower rack频率控制在较低的机架 Pit installation坑安装 Table top removeable from above台面可移动从上面 ...
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The Shanghai area belongs to high moisture content and high compressible soft soil geological structure. The cost of foundation pit support holds larger proportion of construction installation cost.
上海地区属高含水量、高压缩性软土地质，基坑支护费用占建安造价较高比例。
Disadvantages: high cost of foundation pit, in case of heavy rain, easy water, installation, maintenance and maintenance needs to be completed in the foundation.
【缺点】：基坑费用高，遇强降雨天气，易积水，安装，维修和保养需要在基础内部完成。
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