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虫胶
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虫胶
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虫胶
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虫胶
紫胶虫分泌的一种天然琥珀色树脂物质。以紫胶树脂为主要成分,混合着紫胶色素、紫胶蜡、糖类、蛋白质、盐类(或其他掺杂物)等物质。原名紫胶。
Physics
shellac
虫胶
Biology
lac
虫胶
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pencil-beam survey
pencil buoy method
Pencil Drawing
pencil-family
pencil in cup appearance
pencil interactive
pencil of circles
pencil of coaxal circles
pencil of complexes
pencil of confocal conics
pencil of conicoids
pencil of conics
pencil of curves
pencil of hyperplanes
pencil of lines
pencil of matrices
pencil of operators
pencil of parallel lines
pencil of pencils
pencil of planes
pencil of quadrics
pencil of rays
pencil of spheres
pencil of surfaces
pencil rocket
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