词汇	straining ring
释义	straining ring 紧圈
随便看	Relay type automatic telephone switchboard relay type echo suppressor relay type follow-up steering apparatus relay station relay-station Relay station of afferent nerve relay team relay technique relay technology categories relay telemetering system relay telephone relay television relay terminal relay terminals relay test relay test chart relay tester relay testing technique relay test set relay theory relay, thermal relay, thermostatic relay time relay time cut-off relay relay timer