Stratified sampling Objective sampling

3D patch

access patch

acellular tissue repairing patch

adahesive patch

adhesively bonded composite patch repair

Adhesive-matrix type patch

amphibole reaction patch texture

aphis abbreviata patch

Aphis spiraecola Patch

aphis viburniphila patch

Autologous pericardium patch repair

bare patch

bare-patch

Barren patch

Bilayer expanded PTFE patch

biological patch

Biotic patch

Bitongning Patch

black patch