| 1. | It was still dark enough but a rim of lightness lay on the edge of the sea and made the waves gray iron .
天仍然很黑，但大海接天处现出一抹光亮，把浪花映成了铁灰色。 |
| 2. | Gray iron threaded fittings ; classes 125 and 250
灰口铁螺纹配件.等级150和300 |
| 3. | Gray iron castings for marine gearboxes . specifications
船用齿轮箱.灰铸铁件.技术条件 |
| 4. | General specification for gray iron valves of urban gas
城镇燃气用灰铸铁阀门通用技术要求 |
| 5. | Smelting technology of high strength gray iron in induction furnace
高强度灰铸铁感应电炉熔化技术 |
| 6. | Standard specification for gray iron castings
灰铁铸件标准规范 |
| 7. | Production and preparation of gray iron castings for porcelain enameling
陶瓷灰铁铸件的生产和制造 |
| 8. | Gray iron castings for elevated temperatures for non - pressure containing parts
高温无压部件用灰铁铸件 |
| 9. | Modern melting technique of gray iron
现代灰铸铁熔炼技术 |
| 10. | Standard specification for statically cast permanent mold gray iron castings
静铸永久铸模灰铁铸件标准规范 |
