Kev nkig kub ntsuas ntawm cov roj hmab compound yog nqa tawm raws li cov cai ntawm GB / T1682.
Kev txiav txim siab ntawm daim ntawv cog lus lub zog ntawm roj hmab thiab ntaub yog nqa tawm raws li kev ua tiav ntawm GB / T532.
Nov 17, 2019
Kev sim
Koj Tseem Yuav Zoo Li
Xa lus