At present the use of the butterfly valves for more than soft sealed off valve, characterized by simple structure, light weight, easy maintenance, construction costs low;
目前使用的蝶阀多为软密封蝶阀,其特点是结构简单、重量轻、维修方便、成本造价低;
I would say, part of what we look at are hard quantitative factors, but probably more important than the numbers are the soft qualitative attributes.
我想,我们看重的,是一些硬性的量化因素,这可能比那些抽象的特质属性,更为重要
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