चुनाई डोरी के सहायता से सीढ़िया कैसे बनाएं?How to make stairs with the help of election string?

चुनाई डोरी के सहायता से सीढ़िया कैसे बनाएं?How to make stairs with the help of election string?How to make stairs in fixed step ?,How to make stairs along the wall ? Easy way to make stairs?सीढियां बनाने का आसान तरीका ?sidhiyan banane ka asan tarika !sidhiyan kaise banayen? sidhiyon ko kaise banate hai? How to make stairs?

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