Nhi?u V?V c? t? và l?c t? Hong Kong nói r?ng h? ph?i s?ng trong ??a ng?c tr?n gian vì b? Liên ?oàn môn này c?t ti?n th??ng.The toughest faults to locate are those that come about only Now and again—intermittent functions. They can be brought on by negative connections, dust, dirt, corrosion or simply broken wiring or connectors., anh em s?