[12] [12] LV H F, MA X X, ZHANG B, et al. Microwave-vacuum drying of round bamboo: a study of the physical properties［J］. Construction and Building Materials, 2019, 211: 44-51.

[13] [13] GURAU L, PETRU A, VARODI A, et al. The influence of CO2 laser beam power output and scanning speed on surface roughness and colour changes of beech (fagus sylvatica)［J］. Bioresources, 2017, 12(4): 7395-7412.

[14] [14] VIDHOLDOV Z, REINPRECHT L, IGAZ R. The impact of laser surface modification of beech wood on its color and occurrence of molds［J］.BioResources, 2017, 12(2): 4177-4186.

[21] [21] LI R R, XU W, WANG X D, et al. Modeling and predicting of the color changes of wood surface during CO2 laser modification［J］. Journal of Cleaner Production, 2018, 183: 818-823.

[22] [22] KUBOVSKY I, KAK F, REINPRECHT L. The impact of UV radiation on the change of colour and composition of the surface of lime wood treated with a CO2 laser［J］. Journal of Photochemistry and Photobiology A: Chemistry, 2016, 322-323: 60-66.

[23] [23] KUBOVSKY I, KAK F. Changes of the wood surface colour induced by CO2 laser and its durability after the xenon lamp exposure［J］. Wood Research, 2014, 58(4): 581-590.

[24] [24] JOZEF KU′DELA, LADISLAV REINPRECHT, ZUZANA VIDHOLDOV, et al. Surface properties of beech wood modified by CO2 laser［J］. Acta Facultatis Xylologiae Zvolen, 2019, 61(1): 5-18.

[25] [25] TEAC C A, ROU D, BODRLU R, et al. Structural changes in wood under artificial UV light irradiation determined by FTIR spectroscopy and color measurements：A brief review［J］. BioResources, 2013, 8(1): 1478-1507.

[26] [26] KAK F, KUBOVSKY I. Chemical changes of beech wood due to CO2 laser irradiation［J］. Journal of Photochemistry and Photobiology A: Chemistry, 2011, 222(1): 105-110.

[27] [27] KU′DELA J, KUBOVSKY I, ANDREJKO M. Surface properties of beech wood after CO2 laser engraving［J］. Coatings, 2020, 10(1): 77.