Spun silk numbering system绢丝支数制
Silk Road System丝绸之路系统
silk system processing绢纺式工艺
silk yarn counting system生丝支数计数条制
Spun silk system绢纺纺丝法
On Silk-permission Tally System浅析丝割符制度
dram system in silk捻丝打兰制