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Land use right net (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ZHEJIANG TIANLAN
Amortization expense	$ 150	$ 150	$ 159

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- Definition

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 35
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-URI https://asc.fasb.org/extlink&oid=6394232&loc=d3e17558-110866

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