对...进行交易

The company mainly produces all kinds of industry screening machines, food packaging machine (solid, liquid, granular, powder), and bottled beer packaging machine assembly line, as well as large-scale wind transport, dedusting equipment design and installation.

公司主要生产各种行业用筛选机、食品包装机（固体、液体、粒状、粉状）、啤酒包装机和罐装流水线以及大型风力输送、除尘设备的设计与安装。

They began to embroider little squares of cloth.

陪同他的是学校的校长，西科尔斯卡小姐。