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.
Helmets and numbers
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
The main ,principle, of ,safety helmet, is to protect workers against impact by falling objects or struck by swinging object by energy absorption. Upon hitting by an object, the ,helmet, dissipates some of the energy in the following mechanisms: (i) Stretching of harness inside the ,helmet,; (ii) Partial damage of outer shell of ,helmet,.
3/11/2020, · The ellipse and the superellipse are both planar closed curves with a double axis of symmetry. Here we show the isoconcentration contour of the simplified two-dimensional advection-diffusion equation from a stable line source in the center of a wide river. A new two-parameter heteromorphic elliptic equation with a single axis of symmetry is defined.
After more than 2,000 years of architectural use, the ,arch, continues to feature prominently in ,bridge, designs and with good reason: Its semicircular structure elegantly distributes compression through its entire form and diverts weight onto its two abutments, the components of the ,bridge, that directly take on pressure.. Tensional force in ,arch, bridges, on the ,other, hand is virtually negligible.
Despite major advances in ,bridge, and roadway construction ,safety,, it’s still very risky work. Before the Occupational Health and ,Safety, Administration (OSHA) was created 43 years ago, an estimated 14,000 workers were killed on the job every year. The number of fatal injuries has fallen from an average of 38 a day back then to 12 per day now.
23/10/2020, · Think about the ,helmet, characteristics that are designed for a certain application. By adding these characteristics to the basic ,helmet,, the proper ,design, can be determined for an application. Review slides 8-11. Pass out Worksheet A: ,Helmet Design, Project (2 pages) and assign each group one of the ,design, challenges.
The basic ,principle, is to watch the vehicle in front pass a particular point - for example, a drain cover - then count the seconds. There's a couple of easy options: "One thousand, one, two thousand, two", or the old TV advert favourite: "Only a fool breaks the two second rule."
Construction tools list for building construction works such as concrete, brick masonry, leveling, wood works, floor works, slab works, brick laying, plastering etc. is provided. Every construction tool is necessary to achieve good results in the whole project. Along with these ...
Working as engineering teams, students ,design, and create model beam bridges using plastic drinking straws and tape as their construction materials. Their goal is to build the strongest ,bridge, with a truss pattern of their own ,design,, while meeting the ,design, criteria and constraints. They experiment with different geometric shapes and determine how shapes affect the strength of materials. Let ...