Further, the paper discussed the necessity of using full concrete lining for the Xiaowan plunge pool and made new proposals for its bottom elevation, length and shape.
文中还讨论了小湾水垫塘采用全面混凝土衬砌的必要性，并对水垫塘底板高程、长度及体型提出了新建议。
The elevation distance between the take-off point and the bottom of the valley is 300-400 meters averagely, 700 meter the highest.
这些起跳点距离山下谷底的高差，一般在300 -400 米之间，高差最大处可达700 米以上。
Ultra excavation: cable trench excavation shall not exceed the bottom elevation. If ultra-dig in some places, obtain the consent of design units.
沟底超挖：开挖矿用电缆沟不得超过沟底标高，如个别地方超挖时，其处理方法应取得设计单位的同意。
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