Needle slot on the neilsbed armor plate is usually milled one by one by milling machine controlled manually.

针床钢板上的针槽通常是由人工控制用铣床一条条铣出来的，费工费时，铣槽精度低。

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The encoder (from Alps - the tiniest I have ever seen) sits in the slot milled in the PCB, and connects to the stem via a hexagonal channel sized to fit its square end, milled by hand.

编码器(来自Alps -我见过的最小的)放在PCB的槽中，通过六角管道连在表柄上。

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