研究了半天。就准备下单了。最后发现HD有人review After working with this product for 20 years I can say that it has one big weakness. The debris (= small leaves, needles, etc) will collect at the upper part of the guard. So unless you remove (brushing/blowing does NOT do the trick) this debris, the lowest layer of shingles has little or NO chance of drying out. Hence the lifetime of these shingles is halved. So it does require regular cleaning. 有有些犹豫不决了。
【在 u****q 的大作中提到】 : 研究了半天。就准备下单了。最后发现HD有人review : After working with this product for 20 years I can say that it has : one big weakness. The debris (= small leaves, needles, etc) will : collect at the upper part of the guard. So unless you remove : (brushing/blowing does NOT do the trick) this debris, the lowest : layer of shingles has little or NO chance of drying out. Hence the : lifetime of these shingles is halved. So it does require regular : cleaning. : 有有些犹豫不决了。
【在 u****q 的大作中提到】 : 研究了半天。就准备下单了。最后发现HD有人review : After working with this product for 20 years I can say that it has : one big weakness. The debris (= small leaves, needles, etc) will : collect at the upper part of the guard. So unless you remove : (brushing/blowing does NOT do the trick) this debris, the lowest : layer of shingles has little or NO chance of drying out. Hence the : lifetime of these shingles is halved. So it does require regular : cleaning. : 有有些犹豫不决了。