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1 Results for "≡ 예약문의 OIO《⑧④89》83ⓞ⑥ ≡강남레깅스룸P강남레깅스been선릉레깅스룸강남레깅스강남레깅스ripe 강남레깅스ㅫ㉱레깅스룸head"
$15 Geiger-Muller Counter for Beta/Gamma/XRay
Project
by
GH
An inexpensive Geiger counter that can detect several kinds of ionizing radiation using a surplus Soviet tube and a one-use camera circuit
90
9