parent material

基本解釋

Using J607RH welding rod made in China, the weld seam metal and the parent material are of iso-strength.
焊縫金屬與母材的強度配合表現(xiàn)為等強匹配，國產(chǎn)J607RH焊條均能與之獲得較好的強度匹配。
The internal relations between the development of principal soil genus and sedimentary parent material types are analysed.
濱湖相和海相五種類型，初步探討了該平原主要土屬的發(fā)育與沉積母質(zhì)類型之間的內(nèi)在關(guān)系。
Under the same parent material condition, urease activity was significantly correlated with forming time and maturity of soil.
在母質(zhì)相同的情況下，脲酶活性高低又與成土?xí)r間的長短和土壤熟化程度呈正相關(guān)。