国产黄色一级片精品_亚洲日韩天欧美天堂视_亚洲性爱视频在线看_亚洲无码片第一区_99re热线精品视频_性爱一级片免费看_无码日韩精品快射视频_欧美老妇与猛男交性_日韩在线精品亚洲_高清国产下药迷倒美女


image.png

Three parts of mine design: feasibility study, preliminary design, and construction plan.

        In the feasibility study stage, first, Mine Design Institute and the client need to sign the entrustment agreement. work including: planning, investigation, data collection, planning and optimization, project evaluation, "report" writing, and exchanging views with commissioned units to form a formal report.

        Design mainly involves dressing, general layout, electric power, communication, civil engineering, environmental protection, water supply and drainage, tailings, safety and fire protection, investment estimates, economic benefit. For the improvement and extension enterprises, the preliminary design will illustrate the status, characteristics, plant, main problems, utilization of main buildings and equipment.

        When the working drawings completed, the designers must hand the drawings over to construction commanding officers, especially, the notes, strict regulation and important content.


image.png

国产+无码+精品十欧美 | 欧美一级片在线观看 | 国产AV无码区亚洲 | 放荡寡妇欧美一级A片红桃视频 | 亚洲h一二三四区在线观看 国产精品7m凹凸专区免费 | 福利姬视频在线免费 | 老熟女高潮一区二区三区 | 18禁黄平台无码免费 | 欧美黑人狂野猛交老妇 | 免费看无码一级A片放24小时 | 亚洲国产精品国自产拍AV绿帽子 | 特级西西444www大胆高清图片 | 无码少妇秘 一区二区 | 亚洲乱码在线观看 | 日本素人熟女一区二区 | 久久久无码精品人妻一区蜜桃网站 | 日韩女人一级毛片 | 国产成人Av片无码免费午午香 | 做爰高潮A片〈毛片〉 | 每日精品一二三电影九九九电影 | 日日夜夜免费精品视频 | 福利视频一区二区三区 | 8x8Ⅹ成人永久免费视频 | 天堂网2014av| 女人A级毛片19毛水真多 | 艳妇臀荡乳欲伦交换H漫 | 国产18禁黄网站免费观看 | 欧美一级毛片免费大全 | 扒开腿挺进肉嫩小泬喷水网站 | 国产精品一区二区不卡 | 国产精品扒开腿做爽爽爽A片唱戏 | 欧美一级不卡视频 | 国产成人无码AV | 日韩一区二区三区免费观看 | 东京热无码黑人双泬中出 | 激情内射35p麻豆 | 日本被扒开腿添高潮了 | 无码少妇久久精品久久精品 | 午夜精品一区二区三区在线播放 | 69久蜜桃人妻无码精品一区 | 亚洲AV秘 无码一区二区三竹菊 |