| http://www.w3.org/ns/prov#value | - The bottom portions of pillow blocks 36, 36' are preferably provided with air holes 52 (FIG. 2), advantageously having associated therewith longitudinally extending grooves 54, in order to permit injection of a suitable fluid, such as air, between pillow blocks 36, 36' and the associated bearing shafts 30, 32.
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