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Terms for subject Oil / petroleum containing 硬 土 | all forms
ChineseEnglish
天然硬红土brick stone
硬岩粉土alphitolite
硬粘土层blue stone formation
硬质混凝土hard concrete
硬陶土terra cotta
硬黏土bluestone
重硬黏土gault
黏土硬层clay pan

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