Assertion: hinge's bearing | /r/HasProperty | plain bearings
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Source sentences:
text: The leaves could be equal widths, or unequal; the leaves could be “swaged”, meaning bent to compensate for a door with a beveled edge; the bearings could be ball bearings, concealed bearings, lube bearings, or “plain bearings”, indicating no bearings at all; the pin could be non-removeable or fixed; there could be five knuckles, three knuckles, or in some cases, no knuckles; and hinge tips could be decorative or could serve a purpose, such as hospital tips, which are beveled to prevent things from getting caught on them.