The door of the dining-room, which, as we have said, opened directly on the cathedral square, had formerly been ornamented with locks and bolts like the door of a prison.
餐室的门，我们已经说过，开出去便是天主堂前面的广场，从前是装了锁和铁闩的，正象一扇牢门。
The cup head square neck bolts are made on the multiple station cold header, and cut squeeze technology is used to get the square neck.
用多工位冷镦机生产半圆头方颈螺栓 ，对方颈部分的成形采用切挤成形工艺 ，用这种方法生产的产品 ，外形美观 ，质量稳定。
Based on the research of steel housing industry, a new outer-shell joint 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。
应用推荐