NBN 756-1968 1875 Het- meten van de tanddikte van evolvente cilindrische tandwieloverbrengingen Meting over een groep tanden (Wildhabermaat)《延伸线齿轮圆柱齿轮系统厚度的测量 多个轮齿的测量（Wildhaber测定）》.pdf

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