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The contact tube and bracket with a piece of wood or soft metal plate pad.
管子与支架接触处用木块或软金属板垫好。
youdao
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This front pad should contact the keys, not the fingertip.
应用这个部位触键，而不是用指尖。
youdao
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This front pad should contact the keys, not the fingertip.
应用这个部位触键，而不是用指尖。
youdao