【正】 China Petroleum and Chemical Corporation(Sinopec Corp.)has signed a US$350 mil-lion contract with Kuwait Oil Company for building fie oil and gas rigs in
A novel dimer of the bismuth(Ⅲ) complex with dithiotetrahydropyrrolocarbamate, [Bi(S_2CNC_4H_8)_2·(NO_3)]_2, was synthesized and the crystal structure was det
Using the relationships of velocity constraint and the orientation constraint between fingertip surface and body surface, the equations of pure rolling contact