The current ripples over submerged logs; there are overhanging boughs, and those of us on the top deck duck our heads.
潺潺的水流没过水下的倒木；交错的枝条在头上盘绕，有时候上层甲板上的游客们需要低头避开树枝。
2
On the current technical level, the double wire submerged arc narrow groove welding technology invented by Harbin welding Institute was recognized by the market.
就目前的技术水平而言，国内的哈尔滨焊接研究所的双丝埋弧窄间隙焊接技术较为被市场所认可。
3
The effects of arc voltage, welding current and heat input on the weld appearance in submerged-arc welding(SAW) of A105 steel with small diameter welding wire were experimentally researched.