Abrasive materials include ordinary abrasives and superhard abrasives, ordinary abrasives are natural corundum, emery, brown corundum, white corundum, silicon carbide and other materials, superhard materials are natural diamond, artificial diamond, crystal, Potassium Tetroxalate, PBO and so on. At present, Abrasive materials commonly used in industrial production are Synthetic Cryolite, Potassium tetroxalate and Potassium Binoxalate.
The main purpose of Abrasive is to increase the surface area of the object material.To make the required size of particles, the material into a paste, improve the surface finish of the material, in order to meet the requirements of production and application.Used for removing rust and ink stains, polishing metal parts, etc.
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·The new regulations for motor vehicles will begin to implement the prohibition of free change of vehicles
In the coming 2018, the automotive industry has ushered in a wave of "new regulations."
The new version of GB7258-2017 "Safety Technical Conditions for Motor Vehicle Operation" (hereinafter referred to as "New Conditions") will replace the current GB7528-2012 standard (hereinafter referred to as "the old "conditions") on January 1, 2018. ). This standard is jointly issued by the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Administration. All technical contents are mandatory and applicable to all motor vehicles driving on our roads, including traditional gasoline and diesel passenger vehicles, pure electric vehicles, buses, and school buses. , trucks and motorhomes, except for trams and wheeled special machinery. In addition, the new standard adjustment project has a transition period, and some standards are delayed by 13 months, 25 months and 37 months.
Compared with the old "Conditions", the new "Conditions" have more than 150 adjustments and revisions, and there are not a few related to the interests of the owners. In the past, the logo was not given a corresponding penalty, and this behavior in the new "conditions" was "expressed". Cars can only hang trademarks and logos that are “in accordance with the brand of the vehicleâ€. This means that it is not in compliance to Taobao to purchase other manufacturers' logos to hang and to decorate around the trademarks and logos. When driving on the road, the traffic police will issue a ticket and the annual inspection will not pass.
The new "Conditions" stipulate that all motor vehicles must be equipped with a reflective vest, except for the three-wheeled car without a cab. From January 1st, 2018, the triangular warning frame and reflective vest must be standard when the vehicle is inspected.
The new "Conditions" also put forward production requirements for manufacturers. Among them, new energy vehicles such as pure electric vehicles and plug-in hybrids should be able to send appropriate prompt sounds to outsiders when the vehicle starts and the vehicle speed is lower than 20km/h. Avoid accidents. At the same time, the vehicle should be equipped with the function of cutting off the power circuit to avoid secondary traffic accidents. The new "Conditions" also stipulate that electric vehicle windows should have anti-pinch function, including electric windows. All passenger cars and special school buses are required to be used normally when the vehicle is locked. If the child is forgotten in the car, you can tell the outside world by honking the speaker to avoid the tragedy as much as possible. In addition, the new "Conditions" stipulate that all seats should be equipped with three-point seat belts. This is because some car companies have only provided simple two-point seat belts for the middle position of the rear seats of some passenger cars.
It is worth noting that the new "Conditions" stipulate that the passenger car should be equipped with an recording system (EDR) that can record data such as the speed of the vehicle and the braking state at the time of the occurrence of a specific event such as a collision. This means that the driving recorder will be the original factory standard. In addition, the new "Conditions" provide warning information to the driver when the transmission has a functional limit compared to the old "Conditions". This is to prevent the driver from mishandling, and it is good news for novices to start and shift gears.