试样块 meaning in English

coupon
test-piece

Surface texture . measurement devices . roughness comparison specimens
表面组织结构.测量装置.粗糙度比较试样块
Non - destructive testing - penetrant testing - part 3 : reference test blocks iso 3452 - 3 : 1998 ; german version en iso 3452 - 3 : 1998
无损检验.渗透检验.第3部分:标准试样块
Welds in steel ; calibration block no . 2 for ultrasonic examination of welds iso 7963 : 1985 ; german version en 27963 : 1992
钢材的焊接点.焊接点超声波检验用的2号校准试样块