hanging pendant, also known as Bob, is refers to a cast conical objects by metal (iron, steel, copper and other), mainly used for measurement of the verticality of the object, is widely used in machine repair, workshop, construction sites and other fields.

DS-8 double bubble boutique bobs lines, and iron wood commonly used specifications and prices are as follows: packing quantity

200g 72PCS/CTN price 3 yuan

300g 72PCS/CTN price 3.4 yuan

400g 60PCS/CTN price 3.9 yuan

500g 48PCS/CTN price 4.4 yuan

600g 42PCS/CTN price 4.8 yuan

features:

1 using high quality steel forging, the overall induction quenching.

2 products as a whole after electroplating, more beautiful. And with anti rust function, the use of more long-term.

3 fine workmanship, measurement is more accurate.

Using the method of plummet

with heavier special line falling suspension, to determine the axis node as the standard, directly to the construction of suspension layer measuring axis.

(1) geometry line fall to normal weight, should be appropriate (1 ~ 3kg). Weaving and without distortion of thin steel wire by wire.
(2) suspension should be fixed at the upper end of the middle line firmly, no obstacle, especially without lateral resistance.
(3) fall line at the lower end of the line (or tip) of investment subjects, the line of sight to the vertical structure of the surface, when the line left and right line investment and smaller than measured 3 ~ 4mm, take the average position, the difference between the two average position less than 2 ~ 3mm, then take the average position, as the measurement results.
(4) projected to wind and vibration, especially the lateral wind.
(5) in layer by layer measurement cited to with greater line fall (5kg) every 3 ~ 5 layers, by the following direct to put through a line, for school.