双波纹式预热器 double undulated preheater
双波纹板回转式预热器 double undulated preheater
双层波纹管 Double Wall Bellow Swal ; double walls bellow seal ; double layer bellows
双波纹管截止阀 FABA Plus
双壁波纹管 hdpe ; UPVC
HDPE双壁波纹管 HDPE double-wall the corrugated pipe ; HDPE double wall corrugated pipe
聚乙烯双壁波纹管 PE HDPE ; PE Double wall corrugated pipe
双壁波纹电缆套管 Double-Wall Corrugated Pipe
本发明属于建筑型材技术领域，具体涉及一种双波纹腹板钢箱组合梁。
The invention belongs to the technical field of architectural profiles and particularly relates to a double corrugated web steel box composite beam.
他滑翔下来并不像一般鸟儿那样伸下双足溅落海中，而是蜷起双足紧贴着身体掠过海面,在水面留下长长一道波纹。
His glides ended not with the usual feet-down splash into the sea, but with a long flat wake as he touched the surface with his feet tightly streamlined against his body.
我们也能从本季的秋冬发布中看到新上货品中有Visvim曾经发布的三双男靴的影子：曾经流行一时的波纹登山鞋、斯金纳环形鹿皮靴和全皮包裹的登山圆头靴。
We’ve also received updates of three familiar Visvim footwear silhouettes including the ever-popular Serra hiking boot, Skynyrd ring moccasin and Whymper mountain boot.
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