China News Service, Chengdu, June 30 (Reporter Liu Zhongjun) On June 30, the Sichuan Mianyang-Suining-Ziyang-Neijiang Railway (hereinafter referred to as the "Mian-Sui-Neijiang Railway") project construction achieved a major breakthrough. 位于绵阳市三台县铜川镇城园村的三台制梁场正式投产，首个箱梁架设作业顺利完成，标志着绵阳至遂宁段桥梁预制架设施工正式进入规模化、常态化施工阶段。