The pin tumbler lock uses a set of pins to prevent the lock from opening unless the correct key is inserted. The key has a series of grooves on either side of the key's blade that limit the type of lock the key can slide into. As the key slides into the lock, the horizontal grooves on the blade align with the wards in the keyway allowing or denying entry to the cylinder. A series of pointed teeth and notches on the blade, called bittings, then allow pins to move up and down until they are in line with the shear line of the inner and outer cylinder, allowing the cylinder or cam to rotate freely and the lock to open.

Plas Aberllefenni (also known as ""Y Plas"") was a mediaeval manor house, but the older section was demolished in the 1960s and only a later wing is still standing.

According to the Records of the Grand Historian, after the collapse of the Qin dynasty the hegemon Xiang Yu appointed Liu Bang as prince of the small fief of Hanzhong, named after its location on the Han River (in modern southwest Shaanxi). Following Liu Bang's victory in the Chu–Han Contention, the resulting Han dynasty was named after the Hanzhong fief.

The Board of Education initially responded by constructing a sizable addition to the old Columbia School in 1910, which building still housed primary school children as well as high school students. Seth Boyden School and the old Fielding School were erected in 1913 and 1914, respectively. By the fall of 1922 Marshall School was completed. First Street School followed the next spring, and Jefferson School opened in January 1924. Later that year the junior high schools were organized, and both the Tuscan and Montrose buildings were finished.

Watson, Thomas J. (1934) [1930]. Men—Minutes—Money: A Collection of Excerpts from Talks and Messages Delivered and Written at Various Times. IBM. OCLC 391485

All the discovered alkaline earth metals occur in nature. Experiments have been conducted to attempt the synthesis of element 120, the next potential member of the group, but they have all met with failure.

Governments have widely varying policies and practices towards journalists, which control what they can research and write, and what press organizations can publish. Some governments guarantee the freedom of the press; while other nations severely restrict what journalists can research and/or publish.

This bot will be making anywheres between 4 and 12 edits per minute. If you require any test edits or if you grant or deny the flag, please contact me on my talk page over on Simple English Wikipedia: simple:User talk:Razorflame. Darkicebot has the global bot flag. Darkicebot 01:22, 3 марта 2009 (UTC)