A double-tapped bushing is a fitting which serves as a reducer. A double-tapped bushing is more compact than a reducer, but not as flexible. Like a reducer, a double-tapped bushing has two threads of different sizes. The micro speed unit combines two motors and an intermediate gear reducer. Jeffery include a mercury recoil reducer installed in the stock. Potassium sulfate is also used as a flash reducer in artillery propellant charges. When the ends differ in size, it is known as a reducing (or reducer) elbow. Additionally, a 16" and 18" barrel is available with a recoil reducer. An optional Scream grain reducer can reduce film grain in all three color channels. Soaking in a warm bath along with a fever reducer can alleviate symptoms. The counter maintenance is also a performance reducer. Scream film grain reducer is a resolution independent three channel RGB grain reducer. Aminophylline has shown some promise as a bodyfat reducer when used as a topical cream. This was the first all digital noise reducer. The digital noise reducer received a patent in 3-D technology in 1979.