• محمد دریایی   mhdaryai@

    1399/06/03 ساعت 17:59

    ۵۵th session of Working Group B of the #CTBTO started by the remarks of @JoachimSchulze۲ & the comprehensive report of @SinaZerbo on many activities that have been done by the PTS staff during past ۶ challenging months to deliver the services required & state of health of system