Shock pulse method (SPM) is a technique for using signals from rotating rolling bearings as the basis for efficient condition monitoring of machines. From the innovation of the method in 1969 it has been further developed and broadened and is a worldwide accepted philosophy for condition monitoring of rolling bearings and machine maintenance.
History. In Persian 'sangak' means little stone. The bread is baked on a bed of small river stones in an oven. There are usually two varieties of this bread offered at Iranian bakeries: the generic one which has no toppings; and the more expensive variety which is topped with poppy seeds and/or sesame seeds.. Sangak bread was traditionally the bread of the Persian army.
The Shimonoseki city government in 2004, in recognition of the importance of the bombardment in Japanese history, placed several life-size replicas of the guns used by Chōshū where they were captured. [citation needed] The replicas are made of hollow steel and include coin-operated sound effects and smoke from the barrels.