http://pastport.jp/user/hf-weld ja-JP Liaoning Yufei High Frequency Equipment Co., Ltd. is a renowned Chinese company specializing in optical-electronic-machinery integration, modern power electronic technique, high frequency load impedance matching. 2020-02-10T18:39:29+0900 http://pastport.jp/user/hf-weld/timeline/Liaoning%20Yufei%20High%20Frequency%20Equipment%20Co.%2Cltd. hf-weld http://pastport.jp/user/hf-weld/timeline/Liaoning%20Yufei%20High%20Frequency%20Equipment%20Co.%2Cltd.