“城市供热直埋管道技术规程”问世根据建设部标准制修订项目计划，由唐山市热力公司担任主编，城镇直埋供热管道技术规程编写组编写的“城市供热直埋管道技术规程”行业标准已完成征求意见稿，并发送主管部门及有关单位征求意见（１９９４年７月底完成）不久将送审批准发... The “Technical Regulations for Directly Buried Municipal Heating Pipes” was published. According to the Ministry of Construction’s standard project plan, Tangshan Thermal Power Co., Ltd. was the chief editor, and the “Technical Regulations for Directly Buried Municipal Heating Pipes” prepared by the Technical Committee of the Municipal Directly Buried Heat Supply Pipeline. Industry standards have been completed for consultation draft, and sent to the competent authorities and relevant units for comments (completed by the end of July 1994) will soon be submitted for approval and approval...