例句 /

[b]Abstract: [/b]In this research it is introduced that a 5kW laser with CO2 flow transverse was used for cladding the sealing surface of high-parameter valve for petrochemical industry.

[b]Abstract: [/b]In this research it is introduced that a 5kW laser with CO2 flow transverse was used for cladding the sealing surface of high-parameter valve for petrochemical industry.

收稿日期:1998—09—21阀门在使用过程中,其密封面长期处于介质之中并受到介质的冲刷和腐蚀。