calyx (core) dril

• 萼状空心钻；萼状取芯钻

calyx (core) dril的英文翻译是什么意思，词典释义与在线翻译：

英英释义

名词 calyx:

1. (botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud; usually green