The new KGD40 switch type has been developed as DC switch for applications up to 50A.The time to extinguish the arc has been reduced to milliseconds by using permanent magnets in the contact body.This conference is sponsored by Institute of Mathematical Research, and Department of Mathematics, The University of Hong Kong, and Institute of Network Coding. Features and specifications are subject to change without prior notification.Each of the following remarks is only applicable to the corresponding product features or specifications which are related to such remark on this page.◇ The function is only available in 3G Wi-Fi version.^ Subject to local network, data and messaging services.＊The talk time and stand-by time are approximate.Performance of the battery is subject to the network, signal strength, function, selection and profile.＊＊This function is only subject to call forwarding service subscription.
Sixty years ago, in a factory in Kowloon Bay, a product came into being that would revolutionise photography - not that anyone thought so at the time: the Diana was a cheap plastic toy camera that didn't work very well and was designed to be more or less disposable.
The housing didn't fit properly and usually had to be taped to prevent light leakage - light randomly splashing across the images.
The view through the viewfinder didn't necessarily represent the content of the photo.
The film needed to be wound on manually, but it wasn't clear how far you should wind it, so the number of 4cm by 4cm photos on a roll of film was unpredictable, and there was the ever-present possibility of a double exposure if you forgot the winding bit; also, the film didn't fit very well and often jammed.
The camera had three aperture settings and variable focus, but the shutter was set at a single speed - or at least it was in theory, but in practice it could vary unpredictably from about 1/100 of a second to about 1/50.