In this paper, a new deduction on the theoretical linear formula and the practical one of the involute, linear roots pump motor was made.

本文对渐开线型线罗茨泵转子的理论型线、实际型线公式做了新的推导。

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It gives a new deduction for U.S. manufacturing profits, but only tax lawyers and accountants will appreciate figuring out what qualifies as manufacturing and which profits are from it.

FORBES: Burgers, Snow and Pork

Thus were exposed not only the Snake River Potato Growers but the hard-cider producers of New York and Vermont (who were to be allowed to pay lower federal excise taxes) and the sheriffs of Mississippi, who were to be allowed a new tax deduction for business expenses.

ECONOMIST: The line-item veto

Plus it adds a few more tax breaks, including a proposal to give small businesses a new 20 percent deduction.

FORBES: The GOP Pledge: Smaller Government, Bigger Deficits