precision drilling

The difficult points in precision control and the method of replenisher calculating in the manufacture of semisubmerged drilling platform are described on the basis of precision control technique in shipbuilding.

本文以造船精度控制技术为基础，叙述了大型半潜式钻井平台在建造过程中，其精度控制的难点及要求，补偿量的计算，并提出了整体精度评价的方法。

Special guide sleeves are used to obtain greater precision in drilling.

使用特制导向套管来保证较高的打眼精度.

General Precision Grinding equipment, vehicles, milling, drilling machine!

通用设备有精密磨床 、 车 、 铣 、 钻等机床!

Seed spacing is the key factor of the effects on the quality of precision drilling.

穴距是影响水稻播种机精密播种质量的主要因素。

This paper develops a mew approach for processing precision coordinate holes by using common drilling machines.

提供了一种用普通钻床加工高精度坐标孔的方法.

Introduces structure characteristic, precision design calculation of drilling, machining demand and application effect of drilling die and clamp used for producing bonnet by common drill press.

介绍了在普通钻床上加工球阀副阀体法兰的钻模夹具结构，分析了该夹具的钻孔精度、制造要求和使用加工效果。

Effects of broadcast sowing and precision drilling of super rice seed on seedling quality and effectiveness of mechanized transplanting

超级稻精量条播与撒播育秧对秧苗素质及机插效果的影响