日本成本人片视频免费-男人猛戳女人30分钟视频大全-久久青草国产免费频观-欧美丰满大爆乳波霸奶水多-免费午夜无码18禁无码影院

Welcome to Qinhuangdao Tianzi Chemical Industry Co.,Ltd Website!
????
Tel:+86-335-5978826
Address: Green Chemical Industry Garden, Lulong Economic Development Zone, Qinhuangdao City, Hebei Province, China.
Mobile:+86-15227250682,
+86-13313337629
E-mail:tzchem@163.com;
tzchem@tianzichem.com
tzsales@tianzichem.com
???? > ?? ??
  • Aminosulfonic acid

    The molecular formula of the sulfamic acid is NH2S03H. Commercial goods for the white powder, at room temperature, as long as the dry does not contact with water, solid sulfamic acid is not moisture,

  • Ammonium sulfamate

    Nature: white crystal. Soluble in water, molecular weight 114.12, easy to absorb moisture in the air, insoluble in methanol and ethanol.

  • Amino sulfonic acid uses

    Amino sulfonic acid is widely used in acid cleaning agents, such as boiler cleaning, metal and ceramic cleaning equipment; heat exchangers, coolers and engine water cooling system cleaning agent

  • Liquid guanidine hydrochloride

    Liquid guanidine hydrochloride (CH5N3.HCL) CAS: 50-01-1 Structural formula: Molecular formula: CH5N3.HCL Molecular weight: 95.53

  • The development of flame retardants

    Since the early 1950s, more than 60 years, especially since the early 1980s, flame retardants (FR) and flame-retardant polymer materials have played an important role in reducing the loss of life and


  • 5 Records
Copyright(C)2017,Qinhuangdao Tianzi Chemical Industry Co.,Ltd All Rights Reserved. ?Supported by ?ChemNet?ChinaChemNet?Toocle?Copyright Notice
Tel:+86-335-5978826 Fax:+86-335-5978826 E-mail:tzchem@163.com; Contact: Mr liu +86-13931486198
主站蜘蛛池模板: 国产呦交精品免费视频| 色欲综合久久躁天天躁| 五月天激情电影| 亚洲福利国产网曝| 亚洲人成人无码网www国产| 综合偷自拍亚洲乱中文字幕| 免费人妻无码不卡中文视频| 日韩中文字幕免费视频| 日韩av午夜在线观看| 暖暖视频 免费 日本社区| а天堂中文在线官网| 人妻人人澡人人添人人爽人人玩| 婷婷五月六月综合缴情| 全国最大成人网| 黑人大战中国av女叫惨了| 四虎精品成人免费视频| 日本免费不卡一区在线电影 | 韩国无码无遮挡在线观看| 国内精品视频在线观看九九| 久久狼人大香伊蕉国产| 国产精品野外av久久久| 猫咪免费人成网站在线观看| 欧美一区二区三区性视频| 精品剧情v国产在线观看| 97日日碰人人模人人澡| 亚洲中文字幕无码永久免弗| 狠狠色噜噜狠狠狠狠2021| 夜夜春夜夜爽| 激情综合五月丁香亚洲| 国内精品视频一区二区三区八戒| 日韩激情无码不卡码| 亚洲乱亚洲乱少妇无码| 99久久久无码国产精品试看| 国产成人香蕉久久久久| 久久精品少妇高潮a片免费观| 国产h视频在线观看| 成人一区二区免费视频| 国产对白老熟女正在播放| 国产真实乱子伦清晰对白| 国产亚洲午夜高清国产拍精品| 国产精品久久久久久不卡盗摄|