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[4] Wood River Refinery was originally built by Shell in 1917. In the late 1990s, Shell and Texaco merged their downstream segments to form the Motiva (with Saudi national oil company Saudi Aramco) and Equilon joint ventures. During a prolonged period of low refining profit margins, Equilon sold the refinery to Tosco in 2003. Shortly thereafter ...
Drawbar force gauges are able to detect broken or weakening components of the drawbar clamping system, can give indications that the unit needs lubrication, detect gripper mis-adjustment, or demonstrate that the incorrect retention knob is being used for the machine. A retention knob is a device screwed into the narrow end of a tool holder ...
The four-way valve or four-way cock is a fluid control valve whose body has four ports equally spaced round the valve chamber and the plug has two passages to connect adjacent ports. The plug may be cylindrical or tapered, or a ball.
These same 8 washers can be arranged in a 3-3-2 configuration (=), a 4-4 configuration (=), a 2-2-2-2 configuration (=), and various other configurations. The number of unique ways to stack n {\displaystyle {n}} washers is defined by the integer partition function p ( n ) and increases rapidly with large n {\displaystyle {n}} , allowing fine ...
Locking pliers remain clamped to an object without requiring continuous pressure on the handles based on the "over-center" principle. After being properly adjusted using a threaded screw, the pliers are brought to bear by cam action. In the process of being closed on an object the mechanism passes through a point of maximum tightest clamping ...
In a vacuum chuck, air is pumped from a cavity behind the workpiece, and atmospheric pressure provides the holding force. Vacuum produces a hold down pressure of 14.7 psi (101 kPa) at sea level, decreasing at higher elevations where the atmospheric pressure is lower. The decrease in holding pressure is roughly 0.5 psi per 1000' above sea level.