Where were your green laser pointer produced in

Engineering positioning Actinobacillus method: (1) After entering the first party to provide construction drawings for review, to ensure the correct design drawings. Secondly, together with the Party on the scene coordinate point and standard point handover acceptance, found that the error is too large to discuss the approach should be the employer or the Design Institute, confirmed before a formal orientation. (2) site to establish control coordinates the network and the standard points. Site horizontal control network of survey and design method in the following. Where were your green laser pointer  produced in?Level point by the introduction of permanent leveling points, leveling points should take protective measures to ensure that the standard of points is not destroyed. (3) Project location by the construction unit and the planning department before the commencement of construction acceptance. According to the flat shape of the project, decided to adopt a rectangular network control. Project location map to the two directions of the building aspect axis, measured every 30m to set up a line of control, the formation of 30m × 30m field control network, the positioning of the buildings subject to the control network axis. According to the flat shape of the project, suitable for using polygon-site control network. Three lines to cross into the direction of 120 ° correspond to the main axis and Engineering as a control axis of the network to control the axis spacing of 30m, the formation of the scene to control the network. Engineering orientation of the axis prevail. Four.Our   usa green laser pointer  were produced in Guangzhou. Take engineering aspect to the main axes of the scene to control the network axis to form the network of field control. The other axis of the project is to determine the basis for the master axis position. In earthworks during excavation for the determination of elevation, the person responsible for, with the dug with the measurement method. In close to the basement, the elevation points should be diverted to the pit within the mark of pile reinforced. As the pouring of floor construction phase cushion to support the basis of the base plate template. Basement construction phase elevation measurement methods in order to ensure the accuracy requirements of building control in the basic construction should pay attention to accurately measure the set elevation. Elevation pass ± 0.00 to lay a solid foundation. Our     green laser pointer     were self designed by our company.Using theodolite field level point elevation cited measure to the basement pit, draw the horizontal line of the whole number of meters in the pit around the block piles, as the basis for the basement elevation measurements. When the elevation of the Line of Control should be based on construction needs to draw many school measured for each elevation line should be larger errors (> 5mm) should be adjusted. Construction elements of the external control: measurement facilities the theodolite placement in the building near the vertical cast measured. (1) measured the axial relationship to the theodolite strict calibration observation Precise flat level dial vial in order to reduce the vertical axis is not vertical error.The     green laser pointer     were self researched by our company. (2) the axis of extension of the pile point to be accurate, the flag must be accurate, obviously, and properly protected. Should be subject to the first floor of the axis position, measured directly cast to the construction layer to avoid error accumulation layer on the cast caused. (3) take the measured average position is inverted mirror up to vote, to offset the theodolite sight axis is not perpendicular to the horizontal axis and the horizontal axis is not perpendicular to the vertical axis errors affect.