Principal axis connected with knob is available in shell, whose upper and lower section is respectively configured with synchronous upper and lower concave wheel and shifting fork.

  • 在外壳内,设与旋钮相连的主轴,其上下段分别装同步的上、下凹轮和上、下拨叉;

  • 互联网摘选 2025-01-20 11:48:23

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