1 The theoretical calculation formula of tooth profile error When the hard tooth surface involute cylindrical gears are geared, the main source of the tooth profile error can be divided into the error caused by the gear tool and the error caused by the processing machine tool, that i

Product name Specification Material Steel / Origin Price (yuan/ton) Than yesterday last week General line Φ6.5mm Q235 Tangshan Steel 4700 0 30 High Line Φ6.5mm Q235 Wide Steel 4850 -30 0 High Line Φ8mm Q335 Wide Steel 4880 0 30 Rebar Φ10mm HRB335 Sand Steel 5080 0 0 Rebar Φ14mm HRB3

Product Name Specification Material Steel/Origin Price (yuan/ton) Yesterday Last week General line Φ6.5mm Q235 Jiu Steel 4540 -10 -20 High Line Φ6.5mm Q235 Kunming Steel 4570 -10 -10 High Line Φ6.5mm Q235 Jiu Steel 4570 -10 -10 High Line Φ6.5mm Q335 Heavy Steel 4570 -10 -10 Rebar Φ

At present, the domestic automobile transmission enterprises mostly use single-shaft transmissions as their mainstay, and Fast Group is the only company that is dominated by double countershaft transmissions and supplemented by single countershaft transmissions. The advantages of high-, medium-, a

Product Name Specification Material Steel / Origin Price (yuan/ton) Yesterday Last week General line Φ6.5mm Q235 Jiuquan 4400 0 40 Common line Φ6.5mm Q235 Handan 4400 0 40 High line Φ6.5mm Q235 Handan 4470 0 40 High Line Φ6.5mm Q335 Eight Steel 4470 0 40 High Line Φ6.5mm Q235 Haixin

Product name Specification Material Steel / Origin Price (yuan/ton) Than yesterday last week General line Φ6.5mm Q235 Handan 4400 0 90 General line Φ6.5mm Q235 Jiuquan 4400 0 90 High line Φ6.5mm Q235 Pinggang 4550 0 90 High Line Φ6.5-8mm Q235 Beitai 4540 0 90 High Line Φ6.5-8mm Q33

With the development of nanotechnology and advances in coating technology, nano-tool coating materials have also attracted the attention of researchers. There are two main types of nano-coatings: nano-multilayer structures and nano-composite structures. Nano-multilayer coatings gen

On December 24, the State General Administration of Customs issued the No. 74 announcement in 2007, seasonally increasing or introducing most of the export tariff rates for chemical fertilizers and raw materials for fertilizer production. Urea: A provisional tariff of 30% will be imposed from Janu

With the recovery of the global economy, China will also join the WTO. The development of the western region is in full swing. New market opportunities and challenges have already been faced. There is no doubt that the new round of machine tool market fever is coming, but will it be t

From the 25th National Nitrogen Fertilizer Plant's recently concluded experience exchange on technological transformation, it was learned that a key technology for a new urea synthesis method with independent intellectual property rights, the high-pressure liquid-gas fast tubular reactor, has be

The Taiwan Marine Science Research Center held a press conference in Taipei on the 10th to announce the 10th anniversary of the establishment of the center. A new marine scientific research ship with a cost of NT$1.6 billion and a capacity of 2,700 tons has been completed. put up. The new ship has

Model NO.: 36250 Efficiency: 83% Hall Sensor: with D