That is teeth, also known as screw. It is the name of the Han nationality furniture parts in the Ming and Qing Dynasties. The corresponding standard is not found in the national standard, correspon...
Dallas-Fort Worth ranked No. 11 for patent activity out of 250 metros. Patents granted include: • Apple’s control channel for UE power saving • Bank of America’s multi-biometric-factor ...
A passenger wears a face mask on an almost empty Swiss Air flight from Hamburg, Germany to Zurich, Switzerland, on March 22, 2020, in Hamburg, Germany. Airlines worldwide have had to cut back fligh...
Embedded parts (prefabricated parts) are the components that are pre-installed (buried) in concealed works. They are the structural parts that are placed when the structure is poured, and are used ...