High index lenses with 1.74 high index are the thinnest lenses on the market, and are made only for people with the highest prescriptions. If your prescription is lower than +/-6.00 sphere, there is no need for you to spend the extra money for an ultra hi
Royal jelly lyophilized powder is formed by freeze-drying fresh royal jelly, which not only completely retains the nutritional ingredients and active substances of royal jelly, but also effectively solves the defect that the shelf life of fresh royal jell
1. Carbon steel, stainless steel, alloy steel, copper, etc. 2. According to the production method, it can be divided into pushing, pressing, forging, casting, etc.