20802| 58
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內(nèi)孔氣壓動(dòng)態(tài)密封--O型圈擠漲,可行性請(qǐng)教 |
評(píng)分
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點(diǎn)評(píng)
永久變形是壓縮造成的,與拉伸關(guān)系不大
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