Before 1300 AD, humans mainly used astronomical phenomena and continuous movement of flowing materials to time. For example, the sundial is the azimuth timing of the sunshade; the leaking pot and the hourglass are flow meters that utilize water flow and sand flow. In the Eastern Han Dynasty, Zhang Heng made a leaking water switch…
The alarm clock is a clock with a device. It can indicate the time and can send an audible signal or another signal at the time when people order. The movement structure of the alarm clock is mainly composed of mechanical and quartz electronic. Other types such as transistor balance springs, tuning forks and the…
We can shipping to over 200 countries, if you have shipping company you can arrange with them, let them contact us, if you need us arrange shipment we also can do for you. Shipping by sea need 15~35days to most country. Afghanistan Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia…
THN clock company was founded in March 2009, We are direct wall clock manufacturers from China, we have wall clock, alarm clock, grandfather clock, desk and table clock, digital and led. Cuckoo Clock, Digital & Led , Table , Desk Clock, Grandfather Clocks we can custom your own photo on clock, or custom…