Dab tsi yog qhov tsawg tshaj plaws kawm tiav ntawm cov neeg ua haujlwm Leveling?
Dab tsi yog qhov tsawg tshaj plaws kawm tiav ntawm cov neeg ua haujlwm Leveling?

Video: Dab tsi yog qhov tsawg tshaj plaws kawm tiav ntawm cov neeg ua haujlwm Leveling?

Video: Dab tsi yog qhov tsawg tshaj plaws kawm tiav ntawm cov neeg ua haujlwm Leveling?
Video: dab​ neeg​ thaub​ plog​ xuam lau​ tua​ phim​ nyuj​ vais​ 21/2/2022​ 2024, Kaum ib hlis
Anonim

Txhua decimeter ntev yog muab faib ua 20 qhov chaw los ntawm lwm qhov chaw dub thiab dawb txhua qhov ntawm 5 hli thickness. Yog li tsawg kawg suav los yog tsawg tshaj plaws faib uas tuaj yeem nyeem tau yog 5 mm. Cov kawm tiav rau ntawm cov neeg ua haujlwm yog cim rau qhov tseeb ntawm +- 1 hli.

Tsuas yog li ntawd, qhov tsawg tshaj plaws ntawm cov neeg ua haujlwm Leveling yog dab tsi?

Cov tsawg kawg suav ntawm a cov neeg ua haujlwm theem yog 5mm.

Ib yam li ntawd, RL yog dab tsi hauv kev soj ntsuam? Txo qib hauv kev soj ntsuam hais txog qhov sib npaug ntawm qhov siab kev soj ntsuam cov ntsiab lus nrog rau kev siv rau ib qho kev xav tias cov ntaub ntawv. Nws yog ib tug ntsug nrug ntawm kev soj ntsuam taw tes thiab saws dav hlau datum. Yog li nws yog suav hais tias yog lub hauv paus elevation uas yog siv raws li reckon qhov siab lossis qhov tob ntawm lwm qhov chaw tseem ceeb.

Ua raws li qhov no, hom neeg ua haujlwm twg siv hauv Levelling?

A cov neeg ua haujlwm theem , kuj hu ua qib pas nrig, yog ib tug kawm tiav ntoo los yog txhuas pas nrig, siv nrog a qib ntsuas qhov ntsuas qhov sib txawv ntawm qhov siab ntawm cov ntsiab lus lossis qhov siab ntawm cov ntsiab lus saum toj no ntsug datum. Nws ua tsis tau siv tsis muaj ib qib ntsuas.

Qhov tsawg kawg suav ntawm theodolite yog dab tsi?

Nws yog qhov tsawg tshaj plaws tus nqi uas ntsuas tau los ntawm a theodolite . Tsawg kawg suav ntawm theodolite feem ntau yog 20 "thiab 15" thiab lwm yam.

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