amber thống kê 100 ngày lô Amber is fossilized tree resin. Examples of it have been appreciated for its color and natural beauty since the Neolithic times, 1 and worked as a gemstone since antiquity. 2 Amber is used in jewelry and as a healing agent in folk medicine. There are five classes of amber, defined on the basis of their chemical constituents
lch What is Langerhans Cell Histiocytosis? Langerhans cell histiocytosis LCH is a rare, cancer-like condition. It happens when a person’s body makes too many immature Langerhans cells. These cells are a type of immune cell known as histiocytes. When these cells build up, they can form tumors or damage tissue, bone and organs
nước cứng tạm thời Có nhiều phương pháp làm mềm nước cứng tạm thời hiệu quả: đun sôi nước, trao đổi ion, sử dụng hóa chất hoặc thiết kế hệ thống làm mềm nước,... UNITED CHEMICALENVIRONMENT TECHNOLOGY CO., LTD
