mAP (mean Average Precision) might confuse you! | by …

09-06-2020· The mean Average Precision or mAP score is calculated by taking the mean AP over all classes and/or overall IoU thresholds, depending on different detection challenges that exist. In PASCAL VOC2007 challenge, AP for one object class is calculated for an IoU threshold of 0.5. So the mAP is averaged over all object classes.

Levels - Machinist Levels - HigherPrecision.com

These levels are available as bubble or spirit levels as well as electronic levels depending on the operator's preference. Higher Precision offers levels in a variety of different lengths and sensitivities. Several levels have prismatic bases which allow a higher …

precision box level, precision box level Suppliers and ...

Product Number: WK-34-6114, WK-34-6116, WK-34-6117 Precision Frame Spirit Levels are used for adjusting and checking horizontal and vertical surfaces and shafts. Sensitivity .0005″ per 10″. The level features two prismatic sides and also comes equipped with insulating handles. Model Variations: WK-34-6114: 4″ x 1-3/8″ x 4″ WK-34-6116: 6″ x 1-3/8″ x 6″ WK-34-6117: 7-7/8″ x 1-9 ...

Question about Vintage Hilger and Watts precision box …

15-08-2019· Howdy, I just picked up a Hilger and Watts 8x8 precision box level from an auction. Model TB9039-1 I can't seem to locate any info on it. I've found a recent sale on eBay from April and in the listing info its listed as a level, but without any level indicator/spirits.

Box Levels | Empire Level - Built On Trust

Box levels deliver superior durability to survive the jobsite with robust frames designed to protect accuracy over time, ensuring true performance you can trust. The e75 Series TRUE BLUE® Box levels deliver best-in-class accuracy, durability, and readability. Building off the e75 Series, we offer true innovation in advanced technology ...

Master Precision & Machinists' Levels - MSC Industrial …

Master precision and machinists' levels are used for determining the levelness of a work surface and to ensure level setup of lathes, milling machines, surface grinders and precision measurement equipment. These levels are designed with precision ground surfaces and …

Precision Square Level (JIS B7510 Grade A) | Obishi Keiki ...

Precision Square Level (JIS B7510 Grade A) [ Stock No:504-A ] For precision inspection, this product is a JIS mark display permitted Grade A product. The main bubble tube has a bubble chamber in which the lenght of the bubble can be adjusted. It has a V groove, making it possible for measurement of tubular type shapes.

High-precision spirit levels, various measuring ranges ...

WYLER Spirit Levels have been known for decades all around the globe for their high precision and quality. All products are manufactured according to the international standards. The geometry of the bases of spirit levels with high sensitivity are adjusted exactly parallel to the vial axis by scraping.

: precision level

Starrett Precision Level, 98-12 – 12 Inch (300mm) Machinist Leveler Tool with Cast Iron Base, Cross Test Glass Bubble Vials for 2 Direction Leveling, 0.42 mm/m / 80-90 seconds Graduation and Sensitivity. . Usually ships within 6 to 10 days.

Precision Box Levels - Frame Spirit Levels - Warren Knight ...

Product Number: WK-34-6114, WK-34-6116, WK-34-6117 Precision Frame Spirit Levels are used for adjusting and checking horizontal and vertical surfaces and shafts. Sensitivity .0005″ per 10″. The level features two prismatic sides and also comes equipped with insulating handles. Model Variations: WK-34-6114: 4″ x 1-3/8″ x 4″ WK-34-6116: 6″ x 1-3/8″ x 6″ WK-34-6117: 7-7/8″ x 1-9 ...

960-703 Mitutoyo Precision Box Level: 200 x 44 x 200mm

960-703 Mitutoyo Precision Box Level: .02mm/m Sensitivity. The Mitutoyo 960-703 precision box level has the following specifications: Dimensions: 200mm x 44mm x 200mm; Sensitivity: .02mm/m; Accuracy: +/- .006mm; Features: High precision longitudinal and trasverse vials make it possible to check or level surfaces. Supplied in a wooden box

Carpenter levels, Precision level gauge - Beta Tools

Precision surface level made from die-cast iron with ground prismatic base, 2 unbreakable vials, accuracy: 0.02 mm/m . 1699Q. Precision square levels made from die-cast iron with 2 prismatic bases and 2 ground flat bases, 2 unbreakable vials, accuracy: 0.05 mm/m ...

Precision Levels | McMaster-Carr

The sturdy box-style housing has precision-machined leveling surfaces to ensure accuracy. Nonstick Heavy Duty Levels Lightweight yet strong and durable, these bamboo levels won't stick to wet cement. Also known as masonry levels.

Precision Level for sale | In Stock | eBay

Cross levels - If you need to check side declinations in addition to standard levels, you can choose a model that has a cross level for this feature. Double vials - Should you prefer a bubble precision level, you can get one that includes two vials to give you the means to measure both laterally and horizontally.

Levels | Spirit Levels | Bubble Levels | Box Levels | Box ...

Johnson Box-Beam Levels are the toughest, most durable levels to ever grace the construction jobsite. Johnson box level vials are housed in solid blocks of acrylic, making them highly resistant to direct impact. The solid, box level frame construction gives four points of strength, resulting in a level that is nearly impervious to twisting or bending.

Engineers Level | High-Precision Levels | Precision Spirit ...

Engineers Level. A range of precision engineers block levels and machinist workshop levels for use where high accuracy levelling is required. Our precision level range is manufactured and tested to the highest standard and conforms to the British and European Standards (BS958 and DIN877) for precision spirit levels.

Box Levels - Tools Plus

With a large range of sizes from 24" to 96" long box levels are perfect for determining how level medium to long beams are. Tools Plus carries top brands including , Empire Level, and Stabila. Builders Levels and Electronic Levels is just one of the numerous …

Hilger Watts TB5-2 Precision Box Level - Lightglass Optics

The bubble level is accurate to .0005" in 10 iches or 0.05mm per meter. There is a small subsidiary level under the main bubble to make sure the box level (or Block Level) is square in the perpendicular. Two of the level's faces are precision ground flat, while …