Marijuana withdrawal can be more intense than people sometimes realize. While heavy, chronic users may begin to exhibit signs of depression, many users experience insomnia, anxiousness, and irritability.
A New Era. Although diesel locomotives first came to American railroads in the 1920s, their use was confined to switch engines, and later to passenger train locomotives. It wasn't until 1940 that the Electro Motive Division of General Motors (EMD) demonstrated that diesels could practically replace steam locomotives in heavy-duty service.
Today's diesel engines are varied in design and are a. mixture of slow, medium, and high-speed, large and. small cylinder bore. Diesel engineers have been. particularly concerned with hazards associated with. using large bore engines due to the possibility of. explosive type atmospheres in the diesel engine.