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.
Digger bees are sometimes classified in the family Anthophoridae along with the carpenter bees. These hairy bees range from 5 to 25 mm in length and, like other members of this family, the females use scopae (stiff hairs) to carry pollen. Most species nest in the ground or in vertical banks, often in sandy soil. Some species waterproof their brood cells with secreted waxy or oily material.
List of crop plants pollinated by bees. From Wikipedia, the free encyclopedia. This is a list of crop plants pollinated by bees. Most of them are pollinated in whole or part not by honeybees, but by the crop's natural pollinators, like bumblebees, orchard bees, squash bees, and solitary bees.Where the same plants have non-bee pollinators such as birds or other insects, these are also indicated.Pollination by insects is called entomophily.ist of crop plants pollinated by bees. From Wikipedia, the free encyclopedia. This is a list of crop plants pollinated by bees. Most of them are pollinated in whole or part not by honeybees, but by the crop's natural pollinators, like bumblebees, orchard bees, squash bees, and solitary bees.