High speed door
Hongfa high speed roller shutter doors by the Division we learn from foreign advanced technology and equipment , and to draw on the advantages of similar products in domestic self-developed high-tech products , with insulation , insects, wind , dust, noise, anti-odor, lighting and many other features , the high speed door can be widely used in food , chemical , textile , refrigeration , electronics , printing , assembly , precision machinery , logistics . warehousing and other places , the high speed rolling shutter door Can be extremely satisfying frequent high-performance logistics and clean place with a variety of needs and saving energy , increasing air-conditioning effect , fast closing , improve operational efficiency and create a better work environment
PVC high speed door include PVC Rolling shutter door , pvc High Speed Stacking Door , PVC high speed freezer door ,the door frame material is stainless steel and the curtain the France high-density polyester fiber and the surface coating processing, thickness 0.8MM, variety colors can be chose: Red, yellow, blue, green, orange, gray, white, transparent, etc. Tensile strength: 4000/3500N/5cm, tear strength 600/600N. Fire-proofing level: German standard DIN75200 Usage temperature: -30 ° C +70 ° C.
PVC High Speed Doors, high speed fabric doors, high speed rubber doors,PVC Roll up door,stainless steel rolling door SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , https://www.hongfahsrs.com
Japan will develop a manned submersible with a depth of 12,000 meters
  Recently, the Japanese government's marine research and development institution is developing a manned submersible with a depth of 12,000 meters for the exploration of deep-sea resources.
It is reported that the deep submersible was named "Deep Sea 12000" and was under the responsibility of the director of the Marine Engineering Center of the Japan Marine Research and Development Agency, Ishizaki, and the Japanese government's Ministry of Education, Culture, Sports, Science and Technology.
It is understood that the deepest trench in the world is in the Mariana Trench in the southeast of the Ogasawara Islands in Tokyo, with a depth of 109,100 meters. At present, the “Deep Sea 6500†submersible of the Japan Ocean Research and Development Agency can only sink to a depth of 6,500 meters, and the 12,000-meter deep submersible being developed will be expected to realize the ultra-deep sea exploration not seen by the predecessors.