hollow stem [植保] 空心病 ; 空心钻杆
hollow stem valves 空心杆瓣
hollow-stem dth 贯通式潜孔锤
hollow stem valve 空心阀杆气门
celery hollow stem 芹菜空心病
hollow valve stem 空心气门杆
hollow stem continuous auger 空心外螺旋钻具
The long stem of bamboo is hollow, which makes them light and strong.
竹子长长的茎是空的，这使它很轻很结实。
In order to enhance the service hfe of hollow steel for rock drill stem, the odd number side section shape hollow steel has been designed.
为了提高凿岩钎杆用中空钢的使用寿命，设计了奇数边截面形状的中空钢。
It is composed of a taper shank cap, a hollow taper shank, an awl perch, an awl stem casing, a permanent magnet and screwdriver heads of different format dimensions.
该改锥是由锥柄盖、空心锥柄、锥杆、锥杆套、永久磁铁和多个不同规格尺寸的改锥头组成。
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