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金刚石钻头半圆形底唇
dril. semiround nose; single-round nose
半圆形底唇细粒金刚石钻头
earth.sc. single-round nose
〔金刚石钻头〕半圆形底唇
earth.sc. medium round nose
半圆形底唇
oil semiround nose
半圆 形 底唇
: 1 phrase in 1 subject
Earth sciences1