The Mini LED sign is a neat compact 24VDC backlit LED sign. It is available in a range of colours and can be supplied as a single-colour, single-message sign, or as a dual-colour, dual-message sign. For example it can be used to say Open in green and then it can be switched to say Closed in red. A 24VDC switched power supply is required.
Often used next to doors – or on doors – the mini LED sign is used in hospitals, universities, prestigious buildings, hotels, supermarkets, commercial and industrial enterprises worldwide.
英國鐵路公司如何推動凈零排放
It would be better if the trains had good coverage of the country. Large areas have no easy connection and so cars (or buses?) and lorries are still...