古柯
(botany) coca (source of cocaine)
谷壳
husk of grain; grain and chaff
顾客
client; customer; CL:位[wei4]
骨科
orthopedics; orthopedic surgery
古柯树
coca plant (source of cocaine)
古柯碱
cocaine (loanword); also written 可卡因[ke3 ka3 yin1]
顾客至上
the customer reigns supreme (idiom)