50-50 items to 50 400-mesh domestically made copper mesh common carbon film TEM transmission electron microscope Special load-carrying nickel-carbon support film-Taobao
200-mesh carbon film (commonly used) 300-mesh carbon film (commonly used) 400-mesh carbon film 230-mesh carbon film 100-mesh carbon film 50-mesh carbon film 50-hole copper mesh case 100-hole copper mesh case
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