Their firm have contracted to build a double-purpose bridge across the river.
他们公司已签约承建一座横跨大江的两用大桥。
2
The present invention relates to large-scale equipment for producing foamed plastic, and especially to a double-purpose mold frame used for producing foamed plastic.
本发明涉及生产泡沫塑料的大型设备，特别涉及一种用于生产泡沫塑料的双效模具模框。
3
The invention relates to a double-purpose book end used on desks by students, which not only can erect books but also can be utilized as a stable support for the design of a low-voltage reading lamp.