Cummins ISB and QSB Engine Parts. Based on the Cummins B Series, the ISB engine was launched in 1998 and is available in 4 and 6 inline cylinder models. Design innovations include a 24-valve setup and the Interact electronic engine management system, both contributing to increased fuel efficiency and meeting emission regulations.
From 1920 to 1929, stocks more than quadrupled in value â not because of fundamentals such as corporate production and profits, but rather fueled by rampant speculation. The economic house of cards came to a screeching halt on Black Tuesday, October 29, 1929 when the bubble burst.
The stock market crash of 1929 marked the start of the Great Depression, the most widespread in modern history, with effects felt until the start of World War II. In economics, a depression is a sustained, long-term downturn in economic activity in one or more economies. It is a more severe downturn than an economic recession, which is a slowdown in economic activity over the course of a normal business cycle.