The real scientific research certificate contains a lot of gold. There are only five serial numbers in the real scientific research certificate series. There are no secrets, and they are not so mysterious. Those online bloggers don't need to spend time studying it carefully. Official website, a real scientific researcher, made these syndromes clear.
Illumination, the so-called gem-like, pearlescent can reflect the temperament of jewelry, which is the most important. The color and akoya seawater pearls are basically white, and the highest level is a little gray, which is true hemp, blue, gold and flaw. It is divided into three levels: slight flaw, less flaw and more flaw.
Description:
S-type certificate is a special certificate with the highest quality level, which is used by Zhu Hua, Cai Lin, Tianjin and Venus. The inspection items of S-type certificate are perfect, and all inspection indexes, remarks, aurora images and quality marks are readily available.
SS is the abbreviation of suspended solids in water environment research and management. The Chinese name of suspended solids in mbth refers to solid substances suspended in water, including inorganic substances, organic substances, mud, sand, clay and microorganisms.
The content of suspended solids in water is one of the indicators to measure the degree of water pollution. Determination method The detection method of suspended solids in sewage means that the passing aperture of water sample is 0.45? M filter membrane, the solid matter trapped on the filter membrane is dried to constant weight at 103- 105℃.