It is difficult to set down an exact formula because cork is a natural product.

要确定脱模剂的精确配方是困难的，因为软木是一种天然产物。

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The exact formula set for the midplane of the uniform-field wedge magnet is derived.

本文推导了均匀场楔形磁铁在中心平面的精确光学公式。

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Note: This is not an exact measurement or an exact formula and should be treated as a rough approximation.

注意：这不是十分准确的测量或一个准确的公式，这只是个近似值而已。

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Note: This is not an exact measurement or an exact formula and should be treated as a rough approximation.

注意：这不是十分准确的测量或一个准确的公式，这只是个近似值而已。

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