临界量 meaning in English

critical amount
critical discharge
critical flow
critical quantity
criticalflow
threshold quantity

Tq threshold quantity
临界量值
" important sources of danger " refers to the units ( including sites and facilities ) where hazardous substances are produced , carried , used or stored for a long term or temporarily and the quantity of the hazardous substances is equal to or has surpassed the threshold quantity
重大危险源，是指长期地或者临时地生产、搬运、使用或者储存危险物品，且危险物品的数量等于或者超过临界量的单元（包括场所和设施）。