blowbackn.
'blobæk
中文n. 后坐；反吹；气流倒行；枪栓回弹
词根词源
blowback (n.)also blow-back, 1883, in reference to flames in enclosed spaces (firearms, furnaces, etc.), from blow (v.1) + back (adv.). Sense in reference to convert actions, etc., is from 1978.
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