DIN 254
几何产品规范 (GPS) — 锥度系列和锥角;设定角和设定高度的值
Geometrical Product Specifications (GPS) — Series of conical tapers and taper angles; values for setting taper angles and setting heights
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Geometrical Product Specifications (GPS) — Series of conical tapers and taper angles; values for setting taper angles and setting heights