Nghĩa của từ valveless bằng Tiếng Việt
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1. A valveless, apertured flow restrictor is positioned between the flame accelerator and the closed end of the tube.
2. The Brachiocephalic veins, previously known as the innominate veins, are large paired valveless asymmetric veins that drain the head, neck, upper limbs and part of the thorax and mediastinum.
3. The Brachiocephalic veins, previously known as the innominate veins, are large paired valveless asymmetric veins that drain the head, neck, upper limbs and part of the thorax and mediastinum.
4. The Cupules are often in tight clusters of three or two, cup‐ or deeply bowl‐shaped, valveless, covered with imbricate and appressed blunt scales, containing a single fruit in each cupule and enclosing about