Heat exchangers are the critical equipment in petroleum refinery process units, whose corrosion will have a great impact on the normal unit operation and product quality.
冷换设备是石油炼制装置中重要的设备，冷换设备的腐蚀已严重影响产品的质量和装置的正常运行。
Then, on the occasion of guaranteeing product quality, we can use ST14 steel in stead of ST16 steel whose price is higher in order to reduce the production cost for better industrial production.
通过对成形的比较，在保证产品质量的情况下，通过对拉延筋和工艺切口的设置，以ST14钢来代替价格高的ST16钢，以降低生产成本，以供更好工业生产。
Fifth, Xi 'an old age tour product is complete in kind and excellent in quality, but whose marketplace image needs rise urgently.
第五，西安老年旅游产品种类齐全、品质优良，但其市场形象亟需提高。
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