黄色AV录像,免费成人黄色A片,99热超碰在线观看,国产日韩成人AV,日韩av成人无码

08

2021-07

Chemical equipment cleaning includes online cleaning and offline cleaning.

08

2021-07

Circulating water hanging plate experiment A, the standard corrosion test piece Ⅰ type...

08

2021-07

Measures for discharge of waste water by coal chemical enterprises The waste water disc...

08

2021-07

Operating principle of CASS process CASS process is a sequencing batch activated sludge...

Business

More information

Hydraulic treatment agent

The chemicals used in industrial circulating water treatment mainly include Scale Inhibitor, corrosion inhibitor, sterilization and algicide, cleaning agent, prefilm agent, etc. Common methods of industrial boiler water treatment include out-of-boiler water treatment and in-boiler water treatment, and the main chemicals used are: corrosion and Scale Inhibitor, deaerating agent, water supply alkali reducing agent, ion exchange agent, regenerant, softener, alkalinity regulator, scale remover, etc.

ABOUT US

Shaanxi Ande Technology Industry Co., Ltd.

Located in Xi'an, the starting city of the national "the Belt and Road economic belt", Cheng Liyu in February 2002 with a registered capital of 53 million yuan, it was successfully listed on December 29, 2015 (stock code: 834942). On August 15th, 2017, it signed the development strategy agreement with Henan Qingshuiyuan Technology Co., Ltd. (stock code: 300437) and became its wholly-owned subsidiary.
岛国岛国A片在线观看| A级片国产孕妇| 最好av在线收看| 黄av在线| 日本高清好狼色视频| 日韩AV大片| av免费无码| 岛国大片无码AV| 亚洲黄色AV播放| AV美穴福利| 一级A级黄色日B片| 五月天婷婷AV| 手機免費AⅤ| 超碰2025| 一级A片孕妇女人高潮| 怡红院中文无字码AV| 黄带毛片| 亚洲一级黄色| 夜夜骚婷婷AV| a簧片在线免费观看| 手机看AAA级片| 东京热日韩无码| 成人黄色A片播放| 婷婷丁香激情五月深爱网| 97人妻免费视频| 免费观看北条麻妃A片| av不卡免费现在| 色色爱av| 亚洲色人人| 久草成人黄色影视网站| 欧美一级黄色网络| 一级强奸A片| AV无码精品| 特级AV片| 亚洲成人色色AV| 欧美久久打炮| 最新无毒在线a片| 超碰黄色a片| 精品人人操| 真人啪啪视频| 国产成人av91|