... pressure balanced 压力平衡 back pressure tight 背压密封 installation position optional 可选式安装位置 ...
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back pressure tight
背压紧
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Ireland coughed up a penalty under pressure in defence but Hook saw his kick from tight on the left touchline ricochet back off the post.
BBC: Wales 19-13 Ireland
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