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In the context of the comprehensive lifting of epidemic prevention measures, the number of newly confirmed cases in the UK has risen sharply again. Health experts warn that a new wave of infection is already on the way.…
Natural flake graphite are widely used in advanced refractories and coatings in the metallurgical industry. Such as magnesia carbon bricks, crucibles, etc.…
Hollow glass balls are hollow spherical powdered inorganic nonmetallic materials. Their particle size is 5-100mm with a wall thickness ranging from 1-2mm. The compressive strength ranges between 3-125MPa. The following is a list of the most recent…