Based on the research of steel housing industry, a new outer-shelljoint connecting cold-formed square tubular column and H-shaped steel beam with bolts was designed.
结合钢结构住宅产业化的研究，设计了冷弯方钢管与H型钢梁的螺栓连接外套管式节点。
2
Shell also signed a joint assessment agreement with PetroChina in November 2009 for shale-gas cooperation in Sichuan.
2009年11月，壳牌还与中国石油天然气股份有限公司签订了在四川进行页岩气合作的联合评估协议。
3
So the $12 billion joint venture unveiled on February 1st by Shell and Cosan, a big Brazilian producer of ethanol, marks something of a reversal.