免费观看av,国产黄片免费,人人摸人人干人人操,日韩三级片无码,熟妇人妻久久中文字幕

Color-Variable Silica Gel



Molecular formulaxSiO2.yH2O
Characteristics:Bead or irregular shape with purple, orange or yellow.
Packing:25kg per bag or 500 g per bottle.
NoteThe moisture content, packing and size may be customized per your specific requirements.
Use:Mainly for drying and indicating humidity of precision instruments, medicine, petrol chemicals, foodstuff, clothing, leather, electric appliances, other industrial gases, etc.





Copyright(C)2024 , Qingdao Haiwan Specialty Chemicals Co., Ltd. All Rights Reserved.  Supported by  ChemNet  ChinaChemNet Toocle Copyright Notice