Grooved valves are easiest to install.

管状阀门安装最容易。

The grey bark of the tree was deeply grooved.

树上的灰树皮充满了深深的沟槽.

Anti-sand rod pump with helically-grooved barrel.

泵筒带螺旋槽的新型防砂卡抽油泵。

Stop definite, but moderate, and slightly grooved.

止部清晰，但适中，且略有凹槽。

Anti- sand rod pump with helically- grooved barrel .

泵筒带螺旋槽的新型防砂卡抽油泵。

Original yellow stitch detail with grooved sidewalls.

独创的黄色丝线缝纫于侧边凹槽部位；

TS: pre-grooved stem for supervisory switch mounting.

与开槽阀杆用于安装监控开关。

TS: pre - grooved stem for supervisory switch mounting.

与开槽阀杆用于安装监控开关.

Adaxial surface green; midrib raised abaxially, grooved adaxially;

正面绿色背面的中脉突起，正面具槽；

Poisonous snakes have hollow or grooved fangs for injecting venom.

毒蛇有中空或成凹槽的尖牙以射毒液.