wellhead protection areas 建立水源保护区
wellhead protection zoning 地下水水源保护区
wellhead protection zone 水源地保护区
wellhead protection installation 井口保护装置
The main measures of groundwater protection are groundwater vulnerability assessment and wellhead protection area delineation.
进行地下水脆弱性分区评价和水源保护区划分是对含水层进行保护的主要手段。
Balance weight set free fall emergency braking device, which can realize auto control load loss protection, when the wellhead end accidental loss of load, balance weight free fall.
平衡重设置自由落体紧急制动装置，可实现井口端意外失载后平衡重自由落体坠落不能人控，却能自控失载保护的万无一失。
With vertical pipe shield and underwater pile-foundation, a protection frame for wellhead is designed for the development of offshore marginal field.
设计了一种适用于海上边际油气田开发的垂直护管水下桩基式井口保护架。
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