上周黑色系钢材期现货和铁矿石价格几乎全部下跌，诸多产品价格和指数跌幅超过 1%，螺纹钢和热轧期货以及铁矿石价格下跌超过 3%。有色金属价格部分小幅下跌，贵金属价格受美国袭击叙利亚影响有小幅上涨。在没有出现供需关系大幅改变的背景下，钢铁价格普遍下跌印证了市场信心的缺失，期货价格持续下跌促使观望的厂商主动出货，现货价格也大范围下跌。

主力合约螺纹(3162，-2.35%)，热轧(3161，-1.68%)，矿石(560， -0.88%)；申万钢铁（1.44%），排名第三，跑赢万得全 A 指数 1.11%；表现前五的公司分别为河钢股份（10.08%）、新兴铸管（10.03%）、银龙股份（9.99%）、首钢股份（9.95%）、*ST 中特（2.88%）。

雄安概念致板块大涨，但基本面影响有限。雄安概念带动河钢股份、首钢股份、新兴铸管等集体爆发。4 月 1 日-11 日，河钢股份、新兴铸管、首钢股份涨幅分别达到 61.22%、56.25%和 33.10%。受河钢等带动，钢铁板块涨幅明显。以流通市值加权平均计算，SW 钢铁涨幅8.23%，大幅领先大盘。但若剔除河钢、首钢、新兴铸管等标的，板块走势相对较弱，区间涨幅仅有 1.8%。

钢铁材料“优等生”，高端应用“顶梁柱”。（1）物化性能优异：与普钢相比，特钢具有更加优异的物理性能、化学性能、工艺性能或生物相容性，牌号多而规格杂；（2）应用领域高端：正因为其优异的物化性能，特钢在武器装备、核电、高铁、汽车等高端应用领域中起到关键作用。 

Control valves are devices that automatically regulate the flow rate, temperature, and pressure of liquids or gases based on an algorithm that adjusts the desired variable. Sensors detect changes in the flow of a substance and send out signals that control the operation of valves.

Refrigeration is used to preserve perishable food items and ensure food safety. The products offered in the global commercial refrigeration market find application in the commercial, industrial, and residential sectors. The market for commercial registration equipment is driven by regulatory standards on labeling, energy performance, refrigerants, and others. The global commercial refrigeration market offers various types of commercial refrigerators such as refrigerated storage cabinets or display cases, ice-making machinery, and walk-in coolers.

The worldwide changes in work conditions and lifestyle have created a demand for commercial on-demand laundry services as consumers have limited time to do chores like laundry. This, in turn, has increased the demand for commercial laundry equipment. An increase in the disposable income and rise in the number of dualincome families across the globe has also increased the demand for laundromats, ondemand laundry services, and other commercial laundry services.

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Drilling is cutting method where a drill bit is used to make a circular cross-section in any solid material. A drill bit is a multi-point rotary cutting tool. It is attached to the machine that makes it rotate at speeds ranging from hundreds to thousands of revolutions per minute. This, when pressed against the workpiece, creates the desired hole by cutting off chips from the workpiece.

A compressor is an instrument that is designed to supply air or gas at a higher pressure through compression. There are mainly two types of compressors: positive displacement compressors, and continuous flow compressors.