His inventions include a guide robot, an earthquake alarm and an electronic door lock.
他的发明包括一个导盲机器人、一台地震报警器和一把电子门锁。
I have students do an electronic code lock, single chip, it should be useful.
我同学做的电子密码锁，单片机的，应该有用。
I have students do an electronic code lock, single chip, it should be useful.
我同学做的电子密码锁，单片机的，应该有用。
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