How to choose a magnet?

1. What material, performance? 2. Dimensions and Tolerances? 3. Do you want to magnetize? How do you want to magnetize, axial? Radial? 4. The maximum temperature of the magnet working environment? 5. Order quantity? 6. Surface treatment? Galvanized, nickel plated? 7. If you need special treatm-----

Autumn mushrooms to prevent pests and diseases

Spot type: mainly brown spot disease, white hairy hyphae on the surface of fruit body, and small brown spots at the same time. The top cover of the mushroom appeared to shrink, and the individual mushroom cover was cracked. Others were mainly rust spots, and rust-colored spots appeared on the mushr-----