committed to research and develop the world's leading safety relief solutions
leader in safety and pressure relief technology, with domestic and international leading patents and technologies
the sunshine of han
citic guoan chemical group
hengli petrochemical
constant escape
zhejiang petrochemical
shenghong petrochemical
secco
wanhua
shanghai electric
north china pharmaceutical
china petroleum & chemical corporation
huayi group
baosteel
china's cnooc
china's oil
xiang heron
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