In the exploration phase of phosphorus ore, industrial indexes can refer to Table 1 presented a preliminary evaluation of the deposit. Phosphorus-deficient areas can be considered according to factors such as the mining method of phosphate rock and apatite deposit, the difficulty of mineral processing , the comprehensive utilization of common associated minerals (components) and the combination with mineral fertilizer. The general cut-off grade P 2 O 5 ≥ 2% ~ 4%, industrial grade P 2 O 5 ≥ 6%. Industrial grades can also be appropriately reduced under conditions where macroeconomic benefits permit. Our primary focus is providing precision metal stamping and commercial metal stampings in medium to large volume quantities utilizing progressive dies. Our company can also provide smaller quantities when progressive tooling isn`t warranted, with blank dies, compound dies, and stage tooling.Our tooling design and manufacturing is all done in house using old school ingenuity coupled with the latest in CAD design and die building machinery.Some of our strong points to our customers are assisting in their beginning design stages with what is feasible in a metal stamping from your part prints. Assisting with rapid prototyping services and offering competitive tooling and part pricing quotes.We offer value added services in-house, such as tapping, spot welding, arc welding and assembly of your products. We can also provide services such as deburring, plating, anodizing and heat-treating so you will receive your parts in house complete to print and ready to use. Stamping Mould,Stainless Steel Stamping Mould,Professional Custom Stamping Mould,Metal Stamping Mould Topwell Spring Development Ltd. , http://www.topwelldesign.com