短语词组短语Grain clearing sieve 清粮筛grain cleaning sieve 清粮筛grain testing sieve 谷粒试验筛grain n sieve 谷粒筛grain spreader testing sieve 谷粒试验筛interchangeable grain sieve 互换式谷粒筛grain growth control sieve 籽粒筛 返回 grain sieve