- have four bearings: ZWZ, Los axis, axis, and the shaft of glory has been lost in the rut of history, and now, China's bearing industry has formed a new patternthree major groups carve up the market trend seems to Dingli. The ZWZ: to hold the high-end market in the hands of Luoyang Bearing Group: Do China's first, Ha shaft Group: The build quality is the eternal pursuit of the.