2020 KLEEF CHINA 2020 COMVAC AISA 2019 HANNOVER MESSE 2019 COMVAC AISA 2019 KLEEF CHINA 2018 COMVAC AISA 2018 KLEEF CHINA 2017 KLEEF CHINA 2017 COMVAC AISA 2017 GAS CHINA 2017 HANNOVER MESSE 2016 COMVAC AISA 2015 COMVAC AISA 2015 HANNOVER MESSE