1.
1. 无键的：keying sequence 密码序列 | keyless 无键的 | keyman 关键人物
2. \u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
2. 无键：普通键槽keyed | 无键keyless | 尾轴管Stern tube:
adj
1. lacking or not requiring a key
e.g. a keyless lock operated by a series of pushbuttons