松散填土和填石
Loose fill and stone fill
第四纪松散土层
the fourth century loose soil
S型松土铲
S-type loosening-soil shovel
白皮松散斑壳
Lophodermium pini-bungeanae
不松散钢丝绳
low torsional stresses wire rope
步道沟除草松土机
sidewalk trench cultivator
锄草松土
Weeding and loosening the soil