1 Results for "《 예약문의 OIO≡⑧④89≡83O⑥》선릉하이킥る강남하이킥conceive선릉하이킥레깅스룸강남하이킥레깅스룸강남하이킥sensible 강남하이킥레깅스룸㎊㎥하이킥레깅스룸engaged"

In this period of isolation, I'm trying to build an oximeter with parts already in house. An oximeter is made by two leds and a photodiode.