corrade การใช้

Some metals , such as cobalt , nickel , chrome and so on , can corrade the element in high temperature melting state and affect the service life of element
In han culture circle there seems no such weapon with complex pattern on steel , especially in early time . moreover , how to add that pattern ? carve ? corrade
( 7 ) rainfalls can " deposit " the co2 in air , making it to take part in the process of karst , to dissolve and corrade carbonate rock . co2 concentration in soil become lower after heavy rainfall and become higher after general rainfall . ( 8 ) the value of chemical characteristic of soil water in the high elevation area is lower than that in the low elevation area