A composition of matter and a solvent system for use in providing a water resistant coating to a surface of a roof is disclosed. The solvent system comprises a chlorinated solvent blend which includes a vegetable oil. The solvent system and coating composition are non-flammable, environmentally friendly and provide an improved, consistent coating when applied to the surface of a roof.

 
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> Catalyst system for polymerizing cyclic olefin having polar functional group, polymerizing method using the catalyst system, olefin polymer produced by the method and optical anisotropic film comprising the olefin polymer

> Photoelectric encoder with a transparent protective material having a thickness equal to or greater than a depth of focus of an image forming optical system disposed on the surface of a scale
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