Know the knowledge of pull rod box is analysed

And about box of a pull rod, how can you just calculate is going up is quality good?
Pull rod, in concluded after the measure of pull rod box, what we take seriously most is the quality of pull rod box. Seeing quality is pass a barrier, basically have 3 sides: Pull rod, wheel, box includes the material that cloth place picks. Choosing the time of pull rod box, look first securing the drag link on box bag is hale, the fluctuation of pull rod is pulled moving is smooth. If be the draw bar that takes button, see pushbutton be in even by after going down whether very fast bounce. Moreover, read the material of pull rod, be attributed to complete iron, still be outside of the aluminium inside iron, still be completely aluminous. Material first-rate is completely aluminous of course, material contrast is light, solid, be out of shape not easily, capital contrast is tall, the case that chooses this kind of pull rod is wrapped normally not cheap, the contrast that uses on senior box package accordingly is much; It is next outside of the aluminium inside iron, namely outside the canal is iron, inner tube is aluminous. The box of class wraps commonly used Yu Zhonggao; As to complete iron, price contrast low, commonly used at contrast cheap and fine cheap box is wrapped. Hold this, it is very important.
Wheel, seeing it above all is hale, order about wheel has rock. Pulling a case to be on a few paces then, seeing return pulley is acute, turn to ability strong, have without noise, the stand or fall of wheel is very important, ought to choose rubber tyre of platoon annulus and many oak, go up as a result of the plane cloddish move, make wheel is damaged very easily. Still have, should visitting wheel appearance is luster. Normally of luster is do with material, and wheel appearance does not have burnish, a little coarse is to choose call in the data does, such wheel is above quality a bit a few poorer.
Cloth, the common strong case material on current market has ABS, PC, thermoplastic complex material, the material of soft box, gripesack is Oxford cloth, leather to wait normally. The box bag of ABS data is provide those who shape through feeling, look comparative and hale, be out of shape not easily. Blemish is: Data contrast is hard, other it is pair of proportion namely; And the pull rod box of PC material, data contrast is soft, be able to bear or endure it is good to await a gender; The box bag of complex material is to choose cloth + EVA is compound sheeting made-up, come out in needle car tailor through about a hundred working procedure. Overall say, comparative and handy. Function is more powerful, optional sort is more, can a few kinds of color match together. Coriaceous box bag basically is mixed of EVA around, the time contrast that just wraps appearance to dirt demand is cleaned in box is convenience, the time that choosing can consult of EVA complex material.
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