positive proof

短语词组

短语

• positive proof proof positive 确证
• proof positive 铁证;铁证如山;有利证据;确凿的证据
• positive pressure explosion -proof 正压防爆
• Positive pressure explosion -proof house 发明名称
• proof -positive 确凿的证据
• Positive -pressure explosion-proof house 发明名称
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