...换热管；封头 [gap=1582]Keywords: Heat interchanger; Baffle; Tube plate; Tube box; Trades the heat pipe; Seals the head ...
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seals the head
封住头部
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The prior shaft head seals have the defects of easily broken, damaged and worn dynamic and static contact surface.
现有轴头密封动、静接触面易 碎、易损，不耐磨。
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Horrid videos have been shown by campaigners, showing baby seals being clubbed on the head.
ECONOMIST: European politics
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