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Until the 1960s, the company concentrated on the manufacture of power dusters, mist blowers and other pest control machinery. The first Kyoritsu Noki brushcutter was introduced in 1960 and three years later, the company launched its first chainsaw, the Echo CS-80, and the first Kyoritsu Noki tool to bear the "Echo" brand name. In 1970, Kyoritsu ...
A string trimmer, also known by the portmanteau strimmer and the trademarks Weedwacker, Weed Eater and Whipper Snipper, [1] [a] is a garden power tool for cutting grass, small weeds, and groundcover. It uses a whirling monofilament line instead of a blade, which protrudes from a rotating spindle at the end of a long shaft topped by a gasoline ...
The company changed its name to Echo in 1978. [citation needed] Among such rival manufacturers as Stihl, Weed Eater, and Husqvarna, Echo saw the sales of leaf blowers in the 1970s explode. It is estimated that the sale of leaf blowers in the U.S., had exceeded 1 million units by 1989. [citation needed]
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In chemistry and physics, the dimensionless mixing ratio is the abundance of one component of a mixture relative to that of all other components. The term can refer either to mole ratio (see concentration ) or mass ratio (see stoichiometry ).
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
The mixing of two pure components can be expressed introducing the (mass) mixing ratio of them =. Then the mass fractions of the components will be Then the mass fractions of the components will be w 1 = 1 1 + r m , w 2 = r m 1 + r m . {\displaystyle {\begin{aligned}w_{1}&={\frac {1}{1+r_{m}}},\\w_{2}&={\frac {r_{m}}{1+r_{m}}}.\end{aligned}}}
In chemistry, the mass concentration ρ i (or γ i) is defined as the mass of a constituent m i divided by the volume of the mixture V. [1]= For a pure chemical the mass concentration equals its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called the density of a component in a mixture.
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