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2007/12/20 17:53:16 浏览(1533)次 评论(0) 收藏(0)
A dog causes many curious pedestrians to stop in their tracks as it helps its mistress to buy a newspaper every morning in Qionghai, Hainan Province.The dog, named A Xiong, is seen...
2007/12/18 16:53:32 浏览(4405)次 评论(0) 收藏(0)
外六角hexagon head四方头square headT型头 T head(hammer head)圆柱头cheese head圆头round head盘头pan head沉头countersunk head( flat head)半沉头raised countersunk head(oval head)大扁...
2007/12/18 15:57:18 浏览(1397)次 评论(0) 收藏(0)
根据国务院常务会议关于控制高耗能、高污染、资源性产品出口的精神，今年以来国家先后采取一系列措施控制钢铁、电解铝、铁合金、成品油等产品出口，取得较好效果。但部分高耗能、高污染、资源性...
2007/12/18 13:43:41 浏览(1855)次 评论(0) 收藏(0)
Cupped A special cup section supplied on the end of the threaded member having a depression in the end to reduce the area in contact with the surface, which ...
