Derricks and handrails are made of brass stock .

起重机及扶手是黄铜的。

Divers at depths of up to 500 feet had to hack the rigs into pieces small enough to be removed using conventional derricks .

身处500英寸深水中的潜水员必须将钻井平台砍成足够小的碎片，然后才可用传统的起重机将其移走。

Engineers-give orders to tell them to move and automatically capture oil derricks or other civilian buildings .

工程师--可以让它们移动自动占领油井或其他中立建筑。

All tier 1 infantry fall to one vindicator , especially engineers , making them a good last ditch effort in keeping oil derricks from being captured .

一个维护者可以干掉所有一级步兵，尤其是工程师，这是阻止油井被占领的最后一招。

Annual thorough examination of lifting appliances and accessory gear other than derricks and permanent attachments thereto .

起重装置及其配件工具(人字吊臂及其固定附件除外)的周年彻底检验。