Effective, rapid, non volatile, non conflagate, less insitation, recovery use, it is an ideal substitute of gasoline and diesel oil using for cleaning.
Kelvin bridge has the virtues of high sensitivity, precision reading and convenience to use.It is effective tools to measure the electrical resistivity and magnetoresistivity.
In the practice of production and application, for the convenience and intuitivism of operation, some factories require simple notation on the serial number of pricker.
In the related "amide route" starting from 2-chloroisonicotinic acid, 41 ,a secondary amide directing group was used to facilitate the ortho lithiation of the pyridine 3-position.
Mould design of PU hydroclone by involute feeding is introduced.Practice proves,this mould structure is reasonable and the product is took out expediently,it gains marked economic benefits.
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