亚洲一级二级,97人妻无码一区二区精品免费,在线观看欧美一区二区三区,99久久久国产精品免费

NEWS INDEX-NEWS

Matters needing attention in purchasing buried integrated sewage

DSC07720.JPG

Usually, there are two types of materials used in buried equipment: FRP and carbon steel. When purchasing equipment, it is necessary to know the materials used by suppliers. When the process and other conditions are the same, the different prices of materials will vary greatly.

All the facts, no matter how well the supplier introduces the superior performance of the equipment to you, should ask the supplier to provide the previous successful cases, and then send someone to the field to inspect the sewage treatment effect. Although it may delay part of the time, this is really crucial.

Agreed water discharge standard

Many units in the purchase of buried sewage treatment equipment for sewage treatment standards are not specified in the contract, in the latter environmental requirements to improve the premise, will lead to disputes. Because of the different degree of treatment, the cost of sewage treatment will be very different.

Before purchase, compare, sign the contract and specify the payment process.

Select several suppliers for reference, and then make a comprehensive comparison of the factors such as technology, success stories, prices and so on.

A formal contract is signed before payment is made, and the delivery, commissioning and payment process is stipulated.

新民市| 国产AV精国产传媒| 少妇高潮惨叫喷水在线观看| 天天操夜夜操| 亚洲精品国产精品99久久| 亚洲av成人| 性少妇sexfreexxxx片| 免费大片AV手机看片高清| 国产精品天干天干综合网| 一本色道久久99一综合| 欧洲一卡2卡三卡4卡乱码毛1| 欧美乱色伦图片区| 欧美欧洲精品一区二区三| 操日本逼| 国产麻豆精品一区二区三区| 国产精品99精品一区二区三区 | 成人无码在线视频网站| 亚洲午夜久久久久妓女影院| 国产精品毛片在线完整版SAB| 久久久亚| 国产图区亚洲偷窥白拍| 国产伦精品一区二区三区免.费| 久久久久无码国产精品一区| 一本之道av不卡精品| 亚洲一区二区三区波多野结衣| 中文字幕亚洲精品无码| av888| 五月综合婷婷| 麻豆激情| 亚洲国产精品日韩av专区| 亚洲码欧美码一区二区三区| 久久婷婷五月综合97色| 七七88色| 什么网站都能进的浏览器| 汨罗市| 九色综合狠狠综合久久| 日本精品一区二区三区在线视频| 亚洲综合久久一本伊一区| 色网视频| 香蕉夜夜草草久久亚洲香蕉| 隔着超薄肉丝袜做av在线|