柳树是什么季节>微笑拼音专利名称：PLASTIC RAIL SUPPORT 申请号：JP2276277劳务用工合同范本>头英语怎么说
申请日：19770304雅字成语
雄镇东南公开号：JPS5730922B2
公开日：
19820701
专利内容由知识产权出版社提供筑波大学
摘要：PURPOSE:To provide a plastic rail support enabling to restrict the change of an interval between rails by emils by embedding a steel plate dowel with lugs andtheir cutouts in a plastic block to restrict the extension and contraction of the block to thereby increa its bending rigidity.
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