机加工图纸翻译，急

SANHAI

NOTES：
TOOLING POINTS SHOWN ARE ON CAST SURFACES，AND ARE TO BE USED DURING INITIAL SET UP AS FOLLOWS：USE THE SURFACE WITH CAST PART NUMBER TO SQUARE THE CASTING. INDICATE ON A 13 INCH DIA. AND SQUARE WITHIN .063 OF AN INCH. USE THE INSIDE SURFACE OF THE CONE TO CENTER THE CASTING. INDICATE ON 25.75 DIA. AND CENTER WITHIN .063 OF AN INCH.

后面半段实在搞不懂什么意思,求高手帮帮忙.