The barrel, plunger and standing valve of the pump were designed, improving the barrel's force conditions and reinforcing the screw thread's sealing performance and tensile strength.

该泵对泵筒、柱塞、固定阀做了设计，改善了泵筒受力状况，提高了螺纹的密封性能和抗拉强度。

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The relatively smaller cross section of the plunger as compared to the barrel produces a corresponding greater vacuum force.

柱塞与针筒相比相对较小的横截面产生了相应的较大的真空力。

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R1 is influenced by several factors, including the material and condition of the target and plunger, the surface area and shape of the plunger tip, and the amount of force applied.

R 1受几个因素的影响，包括目标和顶杆的材料和状况、顶尖的表面积和形状以及所施加的力的大小。

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Then, with both hands, he broke the hot-dog in half and, with one section in each hand, used the sausage as a plunger to force down the bun as he chewed.

ECONOMIST: It takes guts to eat 50? of Nathan's famous hot dogs