中心线

In addition, the forming reasons of entrapping poles and prejudicial shrinkage existing in the TiAl based alloy valves poured in permanent mould during the centrifugal casting process have been discussed.

此外，针对金属型离心浇铸Ti-48Al-2Cr-2Nb 合金汽车排气阀内部的常见缺陷，探讨了离心力场下排气阀内部卷入性气孔和偏中心线缩松的产生机理。

And destruction usually occurs on angle.(2)Around the keyhole, the stress centralizes, column" edge opt to inflects in local.(3)The change of friction coefficients or bolt pretension forces can"t affect the performance of top-and-seat angel connections so much.(4)The parameters of angel influence joints performance greatly.

破坏一般是由于顶角钢上应力过大，形成塑性铰而导致的；(2)柱翼缘在与顶角钢相连的螺栓孔周围，存在应力集中，容易导致局部屈曲；(3)材料抗滑移系数的改变和螺栓预拉力的大小对于节点受力性能的影响并不明显；(4)角钢参数的改变对节点的各项性能影响显著，增加角钢厚度，节点的强度、刚度和延性都能得到明显的提高；增加角钢长度，节点的强度和刚度也有较大的提高，延性则略有下降；(5)柱轴压比过大时，节点的承载力、刚度以及变形能力明显下降；(6)螺栓中心线到角钢肢背距离增大时，节点的强度和刚度有所下降，但延性略有增加。

To prevent overstressing the soil of a true abutment, the beam seat is sized so the centerline of bearing is at least 3 feet behind the MSE wall face and the bearing pressure on the reinforced soil is no more than 4 kips per square foot.

为了防止加筋土桥肩土体应力超限，梁座的尺寸要适当，以使得承载中心线离 MSE 墙面后至少3英尺，加筋土所受的支承压力不超过4千磅每平方英尺。

If necessary ,fill the space between universal plates and caliper ears with shims as shown on page 33 and 34 to achieve that the BL-618 is in line with the centerline of the brake disc.

如有需要可用垫片垫厚，以使车头BL-618的中心线与刹车碟周边的中心点成水平（图33、34）按图42这样安装的方法是正确的，不能像图41这样安装。

Cock and ball: Turn off the prop is a plunger or a ball, rotating around its own axis.

旋塞和球形：关闭件是柱塞或球，围绕本身的中心线旋转。

The carrying idler used on belt machine hanging in the steel wire rope, must fix with simple arch on the steel cable, which is helped for maintaining the grooved angle to be invariable and the base basically in the identical horizontal middle line.

用于挂在钢丝绳带机上的柔性托滚，需与简易弓形架配套固定在钢绳上，利于保持托滚槽形角不变和托滚底部基本在同一水平中心线上。

The centerline of the chain is not at a uniform radius, as is the centerline of a belt passing around a pulley.

链条的中心线并不像绕过滑轮的皮带的中心那样是处于均匀的半径上。

Piercing blanking die design must die so that the pressure of the press center and the centerline coincides slider.

冲孔落料模具的设计必须使冲模的压力中心和压力机的滑块中心线相重合。

Piercing blanking die design must die so that the pressure ofthe press center and the centerline coincides slider.

冲孔落料模具的设计必须使冲模的压力中心和压力机的滑块中心线相重合。

Ball and plug is the same type of valve, only its closure is a sphere, the sphere rotates around the body axis to achieve open and close a valve.

球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。