HVAC filters are the most vital equipment in maintaining air quality in indoor spaces. It is utilized to filter impurities in air such as pollutants, pollen, and dust in enclosed spaces to provide outlet for cleaner and healthier air. The report on the global HVAC filters market presents a detailed analysis of the trends, future estimations, and thorough study of the market based on material, technology, application, and region.

One-way valves are made from materials such as brass, stainless steel, carbon steel, and others, and are used in industries such oil & gas, power, chemicals, water & wastewater, pharmaceutical, and others. For the purpose of analysis, the report segments the global one-way valve market based on type, application, sales type, and region. The report provides information about various types of one-way valve and revenue generated by sales of one-way valves which are sold through new sales and aftermarket sales

竞争作为市场经济的基本规律，不仅是促进经济发展的重要因素，也是提升市场主体竞争力的强劲动力。随着国防科技工业自然垄断特性的减弱，装备市场已经具备了竞争的基础。在竞争已成为当今世界各军事强国装备市场基本政策取向的大背景下，建立装备市场的竞争机制，不仅是武器装备健康发展的现实需要，更是提升国防科技工业竞争力，促进国防科技工业持续健康发展的客观要求和有力保障。

近期板块回调较多，近一个月（09.09-10.08）跌幅为9.14%，主要因或市场风格切换导致，同样处于高景气的大产业趋势行业指数（新能源汽车指数、锂电池指数等）同样出现调整，因此军工回调较多为市场风格变化下的正常调整。

在氣候異常下，農民被迫休耕的機率提升，此不利本產業的內銷表現，加上外銷成長力道亦將趨緩，估計2021年下半年本產業整體銷售值較2020年同期衰退 1.97%，而全年景氣亦以小幅下滑視之。

The market for Double Suction Pump is growing strongly and poses a lucrative option for marketers. The overall growth in the market is seen both in developed and developing nations due to advancement in technology and growing awareness.

2021 年下半年美國和中國經濟仍將明顯成長，及其各項基礎建設的推動，使得 2021 年下半年本產業銷售值仍將較 2020 年同期呈現小幅成長態勢，但在原物料價格居高不下之情形下，廠商毛利率恐將下降，下半年景氣則以小幅下滑視之。

本周机械设备指数下跌1.09%，沪深300指数下跌0.13%，创业板指上涨0.46%。机械设备在全部28 个行业中涨跌幅排名第20 位。剔除负值后，机械行业股指水平（整体法）27.4。