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A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼的理疗器,它有的凸透筒、目,还有头套和透组,它们在近距离上长时间眼时戴在眼上,可以使被视物的像清楚、放大和变远。

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leiotrichi, leiotrichous, leiphemia, leipobrachia, Leipsic, Leipzig, leis, leishmania, leishmanial, leishmaniasis,

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3G, 401(K), a,

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Crash Course Physics 速成课物理

Say we have a lens that has a spherical face on both sides, known as a convex lens.

假设我们有一个具有球面的头 两侧,称为凸透

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This is made possible through something called a lenticular lens – a corrugated sheet in which each ridge is made up of a convex – or outward-curving – lens.

通过一种叫做柱状透的东西实现的,柱状透一种波纹状的薄板,其每个凸起处都由凸透(即向外弯曲的透)组成。

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leisured, leisureful, leisureless, leisureliness, leisurely, leisuresuit, leisure-time, leisurewear, leisure-wear, Leith,

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3G, 401(K), a,
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