未穿孔 meaning in English

blind hole (recess hole)
puncherless

Properties of unpunched oiled paper perforator tape
穿孔器用的未穿孔涂油纸带的特性
Information processing . specifications for unpunched paper cards
信息处理.未穿孔卡片的规范
Information processing - unpunched paper tape
信息处理未穿孔纸带
Specification for paper tape for data processing - unpunched paper tape
数据处理纸带规范.第1部分:未穿孔纸带
Unpunched paper cards for information processing ; dimensions , requirements , test
信息处理用纸型未穿孔卡片.第1部分:尺寸要求试验