对于无内圈滚针轴承，通过为滚道直径选择合适的公差，可得到合适的内部游隙。
For needle roller bearings without inner ring, a suitable internal clearance is achieved by selecting the appropriate tolerance for the raceway diameter.
美国新开发出的无绕线在线测试仪针床夹具与有绕线针床夹具相比在电气性能上有很大的提高。
The electronic property of wireless apparatus of in-circuit tester developed by the United States of America is higher than wire apparatus.
光纤陶瓷插针是光纤连接器的重要组成部分，后者是近年来光纤通信实用领域需求量最大的无源器件。
The optical fiber cladding serves as an important part of the fiber connector, an optical passive component of the greatest demand in optical communications field.
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