The lock takes its name from the fixed projections, or wards, inside the lock and around the keyhole.

锁，即从固定的预测，其名称或病房，内锁和钥匙孔周围。

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The lock takes its name from the fixed projections, or wards, inside the lock and around the keyhole.

锁，即从固定的预测，其名称或病房，内锁和钥匙孔周围。

youdao