... mechanical oil valve 机械式油阀 mechanical packer 机械式封隔器 mechanical pressure recorder 机械压力记录仪 ...
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hydraulic mechanical packer 水力机械式封隔器
mechanical packer with one-way valve 压环式注浆嘴
mechanical-set packer 机械坐封封隔器
retrievable mechanical set packer 可回收机械坐封封隔器
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