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B4C Boron Carbide Ceramic Top Core Ball for Nuclear Power Reactor protection

$5.00
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Super G5 G10 Class Industrial Ceramic Balls Silicon Nitride Si3n4 Bead Cutting Tolerance +/-0.01mm Surface Roughness 0.3-0.5 Ra

$2.00
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Deep Groove Structure 6904 Si3N4 Auto Lubricating Ceramic Hybrid Silicon Nitride Bearing Ball

$2.00