Secondary stress. A secondary stress is any stress in the structure which is not a primary stress or peak stress. Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global Standards.
Two groups of ground nesting bees commonly. found in Michigan are bumble bees and. burrower (andrenid) bees. Bumble bees are. easily recognized by their large, robust, hairy, black and yellow (sometimes orange) bodies. Bumble bees live in colonies of several. hundred individuals, but only the queens.
Physical characteristics of bees vs wasps. Both bees and wasps have different body and leg structure. Bees have hairy body and legs, whereas wasps have smooth bodies and legs. The abdomen and thorax of a bee is round, whereas in case of a wasp, it is cylindrical.