Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.
Safety helmet is required for air breathing
We provide exclusive customization of the products logo, using advanced printing technology and technology, not suitable for fading, solid and firm, scratch-proof and anti-smashing, and suitable for various scenes such as construction, mining, warehouse, inspection, etc. Our goal is to satisfy your needs. Demand, do your best.
Professional team work and production line which can make nice quality in short time.
The professional team provides 24 * 7 after-sales service for you, which can help you solve any problems
19/3/2020, · NOAA's Storm Prediction Center says the ,derecho, tracked about 770 miles in 14 hours. Just over three dozen locations had ,wind, gusts over 74 mph, mostly in Iowa and northern Illinois, while multiple locations in Iowa clocked ,wind, gusts of 90 mph or greater, including a …
A ,Derecho, is a very long lived and damaging thunderstorm. A storm is classified as a ,derecho, if ,wind, damage swath extends more than 240 miles and has ,wind, gusts of at least 58 mph or greater along most of the length of the storm's path. For more on derechos visit the Storm Prediction Center's ,derecho, page. Caption Explain Downburst Graphic
The National Weather Service defines a ,derecho, as “a widespread, long-lived ,wind, storm that is associated with a band of rapidly moving showers or thunderstorms. Although a ,derecho, can produce destruction similar to the strength of tornadoes, the damage typically is directed in one direction along a relatively straight swath.
A storm’s downdraft—when the cooled air drops back down to the surface—is key to producing the powerful winds that create ,derecho, conditions.When the cool air hits the ground, it spreads out in all directions, pushing warm air near the surface into a front of gusty ,wind,.Stretching from four to six miles across, downbursts also suck more air into a storm, causing it to strengthen.
A ,derecho, is an extensive mass of winds associated with fast-moving thunderstorms or showers. The term ",derecho," originates from a Spanish word meaning “direct” or “straight.” ,Derecho, has been used to refer to the strong winds that move in a straight line as opposed to …