| 摘要 |
A microwave oven having microwave source and a power unit associated therewith which is supplied with mains voltage via a relay. A microprocessor device comprised in the oven is used for controlling switch-on and switch-off of the relay, eliminating thereby the influence by varying switch-on/switch-off times of the one and same relay and between different relays, and allowing for a connection and respectively disconnection of the mains voltage at a desirable phase thereof.
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