The drill bit body has three wings four cylindrical tungsten carbide inserts and curved slots for removal of cuttings.

在结构上采用了三翼四齿的钻头体、弧槽形排粉沟槽，适用于硬、中硬、软岩的三种齿形。

youdao

The removal of national industries in the coastal area to the inland area and the construction of the industry base in the wings are great pictures in the history of Anti-Japanese war.

沿海沿江地区的民族工业大举内迁，建设后方工业基地，写下了抗战史上悲壮而光辉的一页。

youdao

The Center believes that the United States must retain a minimum of 22 active and 14 reserve air wings, a reduction of only one wing from the current total of 37 wings when and if the completion and ratification of a Conventional Forces in Europe agreement necessitates its removal from Europe.

CENTERFORSECURITYPOLICY: Center for Security Policy | A Scorecard On The Defense Budget: Preserving Key Priorities And Programs In An Era Of Cuts