Suggestions are given in the paper that the improvement of numerical control machining technique level should be fastened, so as to manufacture pistons with good quality and performance.
文中建议加快提高内燃机车活塞的数控加工技术水平，以制造出具有良好质量和性能的活塞。
Dachuan Pistons, bring satisfaction to customers through excellent quality, sincerity and credit.
大川活塞，品质卓越，诚信务实，顾客满意。
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