SN300 series rolling Block with a wide variety of advanced design methods and a wide size range, high quality, SN300 series of rolling bearings SKF bearing Block are the most common kind.
SN300系列滚动轴承座具有多种不同的先进设计方式和广阔的尺寸范围,品质优良,SN300系列滚动轴承座是SKF轴承座中最常用的一种。
Stars range in size from neutron stars, which can be only 12 miles (20 kilometers) wide, to supergiants roughly 1,000 times the diameter of the sun.
恒星的尺寸范围从仅有12英里宽(20公里)的中子星到大约1000倍太阳直径的超大恒星。
Stars range in size from neutron stars, which can be only 12 miles (20 kilometers) wide, to supergiants roughly 1, 000 times the diameter of the sun.
恒星的尺寸范围从仅有12英里宽(20公里)的中子星到大约1000倍太阳直径的超大恒星。
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