Compact Fluorescent Lamp: Multitube or multibend single-ended pin-based lamps, including circline lamps.
折叠式日光灯：复式灯管或者折叠式单头针座灯管，包括环形灯管。
2
It also probed into the effects of the of multitube pass structure and of the welding seams between heat exchangers and tubesheets on the stress of the tubesheets.