(1) Resinoid diamond wires can be produced at lower cost, but show blue brittleness after being heated to be cured. Copper powder can be added to the resin to increase the strength of the wire.

(2) This paper introduced the process technology of resinoid diamond grinding wheel for grinding rare earth permanent magnet materials.

(3) A new kind of resinoid bond of diamond wheel toughened polyimide resin micro powder is presented.

(4) The resinoid bond grinding wheel has 3 varieties: the mirror surfaces grinding wheel, the threaded insert disk and the ordinary wheel.

(5) The company produces two leading products are the rubber bond grinding wheel and the resinoid bond grinding wheel.

(6) According to the data of coal petrology and organic geochemistry, the authors consider that these exsudatinites might be a evidence of hydro-carbon generation and expulsion from immature resinoid.

(7) Grinding experiment shows that the wear resistance, grinding efficiency and workpiece surface quality of Polyimide resinoid bond diamond wheel are superior to those of phenolic resinoid diamond wheel.

(8) A kind of the automatic controller of the centrifugal resinoid plate machine is described.