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Khi mua, l?p ??t b?m chm n??c th?i c?n ph?i ch ??n ch?ng lo?i: Nh? b?m n??c s?ch khc v?i b?m bn, b?m bn ??c, bn long hay b?m h? ga c rc th?i l?n vo.
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L?p ??t b?m ph?i ?ng h??ng d?n theo nh s?n xu?t ho?c theo h??ng d?n, hnh v? trong catalogue ?i km.
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Khi l?p ??t xong, cc b?n ph?i th? chi?u quay. (R?t nhi?u nhn vin l?p ??t ch? quan v?n ?? ny v do b?m chm n??c th?i th??ng th? trong h? mng, trong h? nn my b?m ho?t ??ng xui ho?c ng??c chi?u quay ??u ln n??c!?)
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T? ?i?u khi?n: ?? b?o v? ??ng c? ???c ho?t ??ng lu b?n v an ton, cc b?n c?ng nn ch v?n ?? ny. S? d?ng t? ?i?u khi?n s? trnh ???c r?i ro khi c s? c? v? ?i?n d?n ??n tnh tr?ng h? h?ng ??ng c? ho?c chy ??ng c? ?i?n. T? ?i?u khi?n b?o v? ph?i c b? ch?ng m?t pha, ng??c pha, ch?ng k?t roto