Unverified80% confidenceDecision RuleTime unknown
旋转流畅度看轴承类型:滚珠轴承(bearing)比尼龙滑轨或塑料凸点旋转更顺,判断方法是空载单指轻拨能转半圈以上;廉价款仅靠塑料凹槽转动,负重后阻力剧增
1
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80%
Confidence
Long-term
Relevance
-
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