Features:
1) 1) Used in automotive water pumps, and basically consists of standard double-row bearings
2) Ball-ball: with two rows of balls; WIB, BWF, WS, WK, 885000 series, etc.
3) Ball-roller: with one row of balls, one row of rollers; WIR, WN, WKH, 665000 series,etc.
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