- index center
- indexing center
- 分度: scale division; scale mark; ...
- 顶尖: tip centre; apex; core clamp ...
- 顶尖: 1.(最高最上的部分) tip2.[机械工程] centre; apex; core clamper 死顶尖 dead centre
- 分度: [物理学] [电学] scale division; scale mark; division; graduate; graduated dial; dividing; graduation; [机械工程] indexing
- 零度顶点油: zero pour point oil
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