Professional Electrical Technician (နည္းပညာ)
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ELECTRICAL INSTALLATION
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Saturday, October 5, 2013
(40) Ringing Circuit (4)
Ringing Circuit (4)
အိမ္တအိမ္တြင္ringing circuit တပ္ဆင္ရန္ ၊ ေပးထားေသာပံုစံအတြက္ၾကိဳးသြယ္သရုပ္ၿပပံုကိုဆြဲပါ
ဒုတိယ circuit တြင္ door opener ပါ ပါရွိရမည္
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