during service the receiver and the server are both faulted
服务过程中，接收端和服务端都出现故障
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"If during service, the receiver and server are Both faulted at the same time, a" let "shall be called by the umpire."
发球时，发球员和接球员双方同时违例，裁判会判重发球。
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