简体中文
YPH紧固件在石油管紧固件方面具有丰富的经验。我们主要生产的标准是ASTM A193 B7/B7M HEX重螺栓，ASTM320 L7/L43 HEX重型螺栓和螺纹棒，A194 Hex Hex Hex Heax重型螺母，F436 fl436 fl436 Flat flat sutm for thos tho tho thoes the the the the the the thee thee sumpter bart and three ball and three ball and three bart and threeS bart and threws bart and threws bart and threw。表面tre
