David: Energy saving and environmentally products are not only a commitment, they also mean business.
马大卫：生产节能环保产品不仅仅是责任问题，同时也是适应市场的需要。
The main products are Long-stroke energy saving oil pumper and disk type brake.
主要产品有长冲程节能型抽油机和盘式刹车。
The method is time saving and easy in seperation and purification of the products.
合成方法简便，反应时间短，产物易于分离提纯。
The method is time saving and easy in seperation and purification of the products.
合成方法简便，反应时间短，产物易于分离提纯。
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