float on / float off ship
automatic retractable system
cup type retrievable packer
Deployable and Retractable Flexible Appendage
double grip retrievable casing packer
dual string retrievable packer
expendable-retrievable gun
extendible and retractable dog
flexible retractable roof
integrally retractable alternative cutting element
lead for retractable pencil
multiple-string retrievable packer
non-retractable fin stabilizer
non-retractable landing gear
non-retractable tail wheel
quasi-retractable modules
repeatedly deployable and retractable