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A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [ 1 ] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum. When used for stadiametric rangefinding, the level staff is called a stadia rod.
[8] [9] This early attempt was an important step on the road to self-leveling, even if a full load would cause the whole car to lower evenly, rather than maintain height. In 1957, Cadillac introduced the Eldorado Brougham, a Rolls-Royce Silver Cloud competitor, featuring a new Air suspension with a self leveling feature.
U.S. Marines in MOPP 4 gear during the 2003 invasion of Iraq U.S. Army soldiers test MOPP 4 gear at the Yuma Proving Ground's Tropic Regions Test Center in Hawaii. MOPP (an acronym for "Mission Oriented Protective Posture"; pronounced "mop") is protective gear used by U.S. military personnel in a toxic environment, e.g., during a chemical, biological, radiological, or nuclear strike:
Initially, the test used to evaluate the receptive skills (reading and listening) only, but later the test makers integrated writing and speaking section to the test. Unlike other standardized English tests, the EFSET uses computerized adaptive testing methods to adjust the difficulty of the test according to the examinee's ability level. The ...