hollow needle
... hollow mill 髓核钻 hollow needle 空心针 hollow pipe 空心管子 ...
By
... feet 英尺 By 空心针 foot n. 脚,山脚,最底部, 一步长,音步,进程 vi. 跳舞,步行 vt. 表演舞步,付账, 踩踏, 结算 ...
Hollow bearing pin chain
luminous skeleton cannon minute hand
riveted cannon second hand