难检字字典在线查询

汉语拼音：yā tóu

1.液体或液柱的两点之间的高度差（如液面和潜入孔之间的高度差）

2.一种尖头或圆头的物体（如金刚石、硬质合金、硬质钢），用压力压入金属表面借以测定硬度及压入阻力。

• The Dall flow tube is an empirical design with an extremely high pressure head recovery.

  Dall流量管是具有特别高的压头补偿的实验装置.

• When the downstream head is greater than about 3 / 5 of the upstream head, flow is submerged.

  当下游压头大于上游压头约3/5时, 流量是潜流.

• The method involves measurement of the volume of liquid, under constant head conditions.

  这个方法,液体在恒定的压头下,测定液体的体积.

• It is a new type of orifice flowmeter which has practical value.

  高速流的压头损失较小,是具有一定实用价值的新型孔板流量计.

• A baby is an inestimable blessing and bother. --- Mark Twain.

  孩子,是 不可估量 的幸福和辛苦. 马克?吐温将两个性质截然不同的词并置,且压头韵来表示孩子对于我们的意味,可谓深悟凡人生活的不同方面.

• The suction head for the vacuum cleaner improves cleaning performance.

  真空吸尘器的吸入压头改善了吸尘效能.

• Throttles dense solutions of paper mill stock for headbox flow control, etc.

  用于压头箱流体控制的造纸厂原料的稠密流体节流, 等等.

• Special vibrators are installed on the squeeze head to produce better blocks.

  压头上另装有专用振动器,以加大成型效果.

• How much is dynamic head of BFP?

  锅炉给水泵的水力压头是多少?

• Lift the ram and position the tappet ( with the ball bearing ) inside the tester cup.

  举起压头,在测试杯中定位挺杆 ( 带滚珠轴承 ).

• The fatigues of diamond at room temperature and the soft impress or technique are introduced.

  阐述了金刚石室温疲劳破坏现象的产生,介绍了软压头技术.

• PEEK housings and pump heads contribute high stiffness and temperature and chemical resistance.

  PEEK外壳和泵压头有助于高刚度,温度和耐化学性.

• Measure to equip to press with work the head cut over automatically, reducing the artificial vibration.

  测量装置与工作压头自动切换, 减少人为震动.

• Compression fittings for attaching tubing ( piping ) commonly have ferrules ( also known as olives ) in them.

  为附加管 ( 管道 ) 通常有 ( 也称为橄榄在其中 ) 冷压头压缩配件.

• High precise long - length cylinder of bond head can solve the contradiction of cylinder distance, precision safety.

  压头采用高精度长行程双缸保障缸,有效的解决了行程长短与精度及安全相矛盾的问题.