20,000 mm x 47,000 mm x 31 mm NTN AELS204N deep groove ball bearings

NTN Bearings offers a 20,000 mm x 47,000 mm x 31 mm NTN AELS204N deep groove ball bearings selection BEARING Machinery Equipment Co.,Ltd.OF USA 20,000 mm x 47,000 mm x 31 mm of Genuine NTN Bearings at Wholesale Prices. Round bore type: We are Cast Iron housing material: a 20,000 mm x 47,000 mm x 31 mm NTN AELS204N deep groove ball bearings Certified Parts Retailer

What is AELS204N bearing interchange？