|
WO2016155617A1
|
|
Mating structure of liquid extraction piece and test tube assembly
|
|
WO2016155618A1
|
|
Test tube plug and convenient type of disposable sealed body fluid retention device using same
|
|
HUE041972T2
|
|
Detection head of stethoscope
|
|
WO2011026301A1
|
|
Earplug base for stethoscope and earplug head cooperating with earplug base
|
|
CN102232847A
|
|
Connecting piece for rotating shaft and listening head of stethoscope
|
|
CN102232848A
|
|
Stethoscope listening head and listening tube connecting structure
|
|
CN103006254A
|
|
Audio-adjustable listening head structure for stethoscope
|
|
CN102217950A
|
|
Stethoscope head structure with adjustable voice frequency
|
