Detector for Radiation Protection
Whistle Blower_ Rekayasa Bahan_ Sensor Gas CO (TGS 203) Berbahan Semikonduktor SnO2
Sensor Gas _ Dark Wizard of Scientist
Bunda Kehamilan Hipertensi
__Berbagi Ilmu___ Rangkaian Charge Baterai HP (Cell 3
Rian