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AZ7201 Portable Methane Propane Gas Leak Detector Gas Detector CH4 Gas Leakage MeterBrand: Graigar Color: Yellow Features: Low cost handheld type detector checking gas leakage; High measuring range of Methane to 120 ppm; Filter included for high discrimination; Bright 5 level leakage LED indicator; Status ready and battery low led indicator; Quality and reliable Semi Conductor sensor; Built in auto Calibration function while meter powers on; Long and flexible stainless goose neck detect probe; Built in earphone jack for mute mode
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Best in 7 days
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4.1 ★★★★★
Based on 490 reviews
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Product Reviews
★★★★★ 5
An absolutely brilliant book
Format: Paperback
This is an amazing book for the right kind of reader. It's a lot like Euclid's Elements but for computers as it leads the reader through designing a computer from first principles and builds to the point of creating software and adding peripherals. It's an amazingly clear but slightly challenging read. I have given this book as a gift many many times. It's an absolute classic in my opinion.
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Reviewed in the United States on March 19, 2025
★★★★★ 5
Great introduction to Godot 4
Format: Kindle
I've been writing various types of software for 10 years and was interested in learning Godot for 2D games. This book turned out to be informative and easy to follow and gave me the knowledge I was seeking. I learn best by example, and this project focused book was excellent in that regard.
If you have zero programming experience, I would recommend learning something like Python before diving into this book. The book teaches with GDScript, which is Godot's Python-like programming language.
There are some minor mistakes in the book, but an errata is currently being kept up-to-date on the github repository for the book. I opened a few issues for things I discovered, and the author added those things to the errata. Keep this in mind if you end up getting stuck on something and are 100% sure you followed the directions in the book.
I use Unreal for 3D games, so I have not yet gone through the chapters of this book for 3D games. I wouldn't expect a drastic drop in quality, but for the purposes of this review I can't give any insight on the 3D chapters.
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Reviewed in the United States on November 6, 2023
★★★★★ 5
Use boxes
Format: Paperback
Love the start of this too but will not tell you how to import projects use boxes on the side of your pc
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Reviewed in the United States on December 9, 2025
★★★★★ 5
Great!
Format: Paperback
Enjoying it a lot so far.
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Reviewed in the United States on February 21, 2025
★★★★★ 5
Learning Godot
Format: Paperback
simple and easy introduction to godot and gdscript.
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Reviewed in the United States on January 19, 2024
