sub-joint
... subjob子作业 次作业 sub-joint副接头 subjugal颧骨下的 ...
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该示教听诊器在下胶管中都接有一个将主、副耳件及胸件接通的三通接头。
A three-way piece which causes the main ear piece, the auxiliary ear piece and the chest piece to communicate is connected in the bottom rubber pipe of the stethoscope for teaching.
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